every 0.10 volts doubles the cycles, if charging up to 4.20 volts it lasts 500 cycles, 4.10v 1000 cycles and so on, on this site it doesn't show how many cycles it's 3.8 volts, but a guy tested it and it's 8000 cycles , 3.9 volts is 4000, and 3.7v is 16000 cycles! beyond being paper weights? A 2 year old Li based battery is considered old doesnt matter if you used it or not and probably is holding 80% of initial charge. Schitts Creek, a one-liner packed gem of a show, knows that its title is the punchline in many an anecdote, and recycles it as the punchline for its premise. Scare maestro Mike Flanagan finds horror in humanity, shirking the usual tropes in favor of mining the mundane. Processor power management may be prevented if a USB device does not enter the Suspend state when not in use. From the installed water meters, 420938 L (111,200 gal) of water were consumed during 2002 for the two passive cooling towers at the Zion National Park visitors' center. If assuming useful work was done in each depth, then in fact getting 500 cycles actually gets a bit more work than 4700 cycles of only 10% the depth." zzrm316@163.com. Please HELP!!!!!! However, the series is not just Geralt's story, but also that of crowned princess Ciri and the sorceress Yennefer of Vengerberg. Also, show me such an agreement for any non-Software product. This can be achieved through use of fountains or more architectural designs such as the evaporative downdraft cooling tower, also called a "passive cooling tower". Hi Edward - I don't understand your response. For Tina ~ All new batteries come in a semi discharged state. [see exchange between David & Paul on April 07, 2011] They agree that the amount of work done by the Li-battery is pretty much the same whatever approach you take. So, in the last graph, you should be reading off the number of cycles on the y-axis, against each charge/discharge rate on the x-axis. Using the data of Table 2 which gives the number of cycles to 70% capacity as a function of depth of discharge, one can derive the relative amount of total energy extracted (a dimensionless quantity) from a Li-ion cell as a function of DoD: 100% DoD yields 500 units of energy from a Li-ion cell over its useful life; 50% DoD provides 750 units; 25% DoD provides 625 units; and 10% DoD provides 470 units. I basically did a full charge, waited for about 5 minutes, pulled out the battery and measured with my multimeter. Thanks to all for your wonderful contributions. do we hav problem in doping it, Excellent information on Li-Ion laptop batteries. please email to me zzrm316@163.com Edward rechargeable boy. Allow the battery to charge fully ( with your Laptop off ) Once charged use your laptop on battery mode till it discharges and you get a pop up suggesting that you have to charge your battery. Microsoft probably did the best they could but are handcuffed by their open hardware environment, and most hardware isn't battery management enlightened. My settings - 1. I have read that partial discharges are the best for longevity of the battery. The CELdek media is more often used in large commercial and industrial installations. I'm sure I may be misunderstanding something, but I don't see how the numbers add up. This is gripping television that cannot be missed. I can't find the link right now, but there is a guy who has a pretty good blog dedicated to reviewing the various replacement batteries out there. BU-1006: Cost of Mobile and Renewable Power, Predictive Test Methods for Starter Batteries, How to Charge Li-ion with a Parasitic Load, Assuring Safety of Lithium-ion in the Workforce, How to Make Battery Performance Transparent, Making Battery State-of-health Transparent. It's almost November, which can mean only one thing in the writing community: It's time to get ready forNational Novel Writing To see what your friends thought of this book. BU-206: Lithium-polymer: Substance or Hype? The gap between 50% and 25% discharge would probably also get a lot smaller, or may be even vanish at all. Then cooled, moist air is delivered into the building via a vent in the roof or wall. Thanks. Is this going to be a problem? ", 10-28-10, I sell cell phones and other devices that use lithium batteries and I have been misinforming my customers inregardes to charging requirements of their batteries. But I wonder if the conclusion drawn on table 2 are absolutely accurate? Patrick, First of all, IMPRES batteries come in different flavours: NiCd, NiMH, Li-Ion. They do not cycle very well. From a pure engineering perspective, your point is taken. Thanks for your great informative website. Like everything else, battery technology will evolve by natural selection. This will also help calibrate your phone's battery meter to the new battery. If I have finished what I am doing and it has got to say 60%, do let it continue up to 100% and then run down, or just run down from that 60%? Unfortunately, the lesson you have learned is one I think most of us are perpetually repeating, and I am struggling to understand completely what the process is that destroys most of these cells. Applications are growing and are encroaching into markets that previously were solidly held by lead acid, such as standby and load leveling. The charger is putting out 5v. Who buys a horrendously expensive notebook battery just because the battery only delivers 5 hours of work time instead of 7? 4/ Need a clear indication when a battery needs replacing. What this usage implies is that the phone will be connected 100% of the time to its charger. How long is it ok to just leave it in the box? My thoughts exactly. For the most part, Charlie Brooker's dystopian sci-fi show is set just a few years into the future, a place where our every technological whim is accounted for. At 32C (90F) and 15% relative humidity, air may be cooled to nearly 16C (61F). I am hoping that by and by, the weighted cycle lifespan will displace the presently used numerical cycle lifespan. First let me thank you for this great article and this website, very informative. So total energy produced during the battery's lifetime will be 100 times compared to 100% DOD. My Toshiba laptop and cell phone batteries will serve me longer and stronger. Id be grateful to anyone that could provide a viable solution. Evaporative cooling is especially well suited for climates where the air is hot and humidity is low. The equipment would then be left plugged to a mains supply as much as possible. Trying to figure out what voltage equates to 40% SoC? So looking at these four values, the 25% DoD seems to be the best, but more values would be helpful. This article sais: Environmental conditions, and not cycling alone, are a key ingredient to longevity, and the worst situation is keeping a fully charged battery at elevated temperatures. In other words, Figure 6 presents that a 75% DoD will results in 21% loss in maximum battery capacity after ~4,000 discharge cycles, whereas Table 2 presents that an 80% DoD will results in 30% loss in maximum battery capacity after only ~400 discharge cycles (10 times fewer cycles compared to Figure 2!). For accessible cells such as in common LED flashlights, you might have full control, or nearly so. Doesn't this mean that the curves ending in a 100% SoC are unrealistically inflating the degradation of the batteries? I have a digital volt meter. I felt very pleased. In this case we have lower voltage, but the battery is much more in use, enduring more (partial) cycles. Benefits of evaporative cooling chambers for many rural communities in these regions include reduced post-harvest loss, less time spent traveling to the market, monetary savings, and increased availability of vegetables for consumption.[11][12]. In one of these articles the author points out that the worst thing you can do to your battery is to use it while you are charging, yet that is what most of us are constantly doing with a cell phone; It gets low on charge, and you still need to use it, so you plug it in and continue your conversation. Also, where can I found a good reference to determine the safe SOC range of large scale BESS. If only a little mix it can be separated easier, but allowing them to completely "swirl" makes it real hard to separate the flavors (the positive and negative charges). Well, unless it says Lazarus somewhere on the label next to the P/N, this appears to be bunk. The temperature of dry air can be dropped significantly through the phase transition of liquid water to water vapor (evaporation). -Ty www.ebatts.com, I would like to know what is different, if anything, about charging and discharging Lithium Iron Phosphate (LiFePO4) batteries - relatively new chemistry in the Lithium family of batteries. Atypical is a coming-of-age dramedy that follows Sam (Keir Gilchrist), an 18-year-old on the autistic spectrum as he searches for love and independence. It means that we must compare capacity loss of first charging cycle after 7500 cycle with capacity loss of second charging cycle fter 7500/5=1500 cycles. A topping charge is only applied when the battery voltage drops to a certain level. High voltages and exposure to elevated temperature is said to degrade the battery quicker than cycling under normal condition. I would certainly not recommend discharging any of these chemistries small amounts between recharges. This could be what is going on with your 58% vs 73% values. LiFePO4 is the variant that was the basis for the late great A123 Systems battery company, who were anxiously working to get into the electric car industry in a big way, before they went down and were acquired by a Chinese company (not sure it's a done deal yet). Most users do not remove the AC power, and I like to believe that this practice is safe." The smaller the depth of discharge, the longer the battery will last is WRONG based on Table 2. For a cloud of 1 million alkali atoms, this temperature is about 1K. This seems to me to say that the depth of discharge is much less important than you would initially think from just looking at the number of cycles alone, as the amount of output is actually slightly more under the deep cycle, but for practical purposes is close to equivalent. Is this a good strategy? The author suggests that this induces many tiny cycles of charge/discharge, in turn creating lots of heat, which might account for the shortened battery life over time. A well-designed layout can effectively scavenge and expel the hot air from desired areas without the need for an above-ceiling ducted venting system. great work and solid information. Another question has come to my mind regarding saving power on Li-ion batteries. If you've seen Valhalla already, we've got answers to many of you Vikings: Valhalla season 2 questions through that link. The system will consume less power when the average processor utilization is very low. However, clever engineers could convince their firms shallow minded MBAs that they can have it both ways - they can quote portable endurance based on 4.20 V charging in their specs, yet provide a utility which allows users to manage their cells for maximum lifespan by lowering the default 4.20 V peak charge voltage to more lifespan friendly levels, including of course 3.92 V. Evidently a very rare few do - in his February 28, 2011 comment above Rob Smith advised that his Sony VAIO laptop provides such a utility (except that it evidently presents charge level information as percent of capacity rather than voltage). It is best to use a charger designed for the intended product. Cassim makes a great point about kilowatt hours but let us talk practically speaking. I try to charge my drill batteries before they run out, hopefully by around 25% but it's use and we can't really control that. I do this for my drill batteries and you may want to do the same- if you're storing the bike keep the state of charge at like 75% or less. (avoid full charge to not have high voltage in the battery) ? They are inclined to be overconfident and arrogant about their technical prowess, assuming batteries to be electrochemical devices in need of rescue and assistance by electronics experts. No need to worry, just look at percentage, 100% is still 100%. Or does using the battery in a cold or frozen state cause the dammage? I then go to re-charge them after 1 month (insight 1). As such, how is it that I get a faster charge from, say, the one that plugs into the cigarette lighter as compared to the one that is usb powered? ireally found the information reall useful. [7], Passive direct evaporative cooling can occur anywhere that the evaporatively cooled water can cool a space without the assist of a fan. This avoids running the refrigeration system when unnecessary. House of Cards, based on the UK BBC series of the same name, sees the senator try and scheme his way to the White House while throwing everybody under the bus on his way. But the article seems to imply that very small cycles is far better. I hope atleast some of you are able to understand this now. Modern hot air balloons heat the air by burning propane, the same substance commonly used in outdoor cooking grills. @ Silcestre Martins Yes , I think so. Another issue: do you recommend keeping the battery charge in 40% or its not necessary? http://www.motorolasolutions.com/en_us/products/two-way-radio-accessories/batteries/impres.html Contrary to NiCd and NiMH, there is no such "conditioning" needed for the Li-Ion batteries nor does it present any advantage to the battery capacity. In climates not considered arid, indirect evaporative cooling can still take advantage of the evaporative cooling process without increasing humidity. In the case of laptop packs and other multiple cell assemblies like those used with cordless tools, my forensic investigations reveal individual cells which have failed either by shorting or some form of diminished capacity which renders the entire pack useless. Furthermore, assuming you store the laptop overnight at ~40%, it will lose an additional ~5% capacity (Table 3). The discrepancy that I am referring to, however, is not in regards to the maximum battery capacity. @ Jeff Simon, who wrote: "Maybe I am the only one missing one aspect of the number of cycles verses depth of discharge: if you only get 500 cycles with 100% discharge, as compared to 4700 cycles with 10% discharge, those cycles are not equivalent. [CDATA[ Now if you have a 25% DoD you get 2.5 units of use per recharge. Netflixs most overlooked superhero show well, until season 2 came along and quickly became one of the most-watched series of 2020. I await your feedback. The Crown charts the life of Queen Elizabeth II from the start of her reign up until the present day. On battery the voltage is around 11V and goes down the more the battery is discharged. I do it primarily yo save my eyes [oh yes, i love my eyes more that the environment] but it also prolongs battery life. It is really helpful to restore useful units, assess questionable ones, and the explanations are at a "university" level. T.I.A. So, for a 10% depth of discharge, the battery should last for 4700 FULL recharge cycles - not 4700 recharge cycles of just 10%? The reality show follows five men from the LGBTQ+ community as they makeover a different person or, as they are called on the show, "hero" each episode. Toni Collette and Merritt Wever headline this limited series as two detectives from different districts who unite to bring a serial rapist to justice. In practical terms, yes, you can charge from 20-80% and have a similar capacity after 1000 cycles, but the usable capacity will always be less than if you did 20-100%. Applying the peak charge voltage on a subsequent charge will restore the full capacity." Best regards Arnfinn. Let us know whats wrong with this preview of, Published They all discharge together. (100% means = what is the voltage range and for 0% = what is the voltage ), the charger for my lithium battery (for my golf cart) has a red light when charging and green when fully charged. Evaporative media efficiency usually runs between 80% to 90%. I dont have an example of a cooler one - if I did, dont you think Id be using it?!). In addition, sunlight may degrade some media, and other components of the cooler. For your kind information, no charger manufacturing company in the world specifies, the level at which a battery should be recharged ( 11% / 14% ) that is purely the responsibility of the Laptop manufacturing company. (Ans: 1 dis.cycle = 4 x 25%DoD = 2 x 50%DoDetc..). I have a few of my own, and I would love to hear back from all (almost) of you. Heres the unfortunate rub: Due to marketing related specsmanship pressures, cell management systems (charging and other management circuits) have different priorities. Some battery/charger combinations will detect this situation sooner than others. Your article and discussions on DoD is interesting, to work out the number of DoD vs kms travelled and to try and work out the lifecycle capacity left on a battery and the kms remaining to be run. P.S. WebStill fun. It was for the people who just come here for free answers without putting forth any effort to actually learn what the article is teaching. I charged it with a laptop charged output of 19.5v, 3.33A. Does it mean it's optimal to keep the charger plugged in all the time (since the more shallow the discharge, the better - so by extrapolation, the most shallow discharge - no discharge, would be the best). It makes the current POTUS look tame by comparison. In a world full of seedy politicians and sordid scandals, Frank Underwood stands at the very top. Because of this, evaporative coolers use only a fraction of the energy of vapor-compression or absorption air conditioning systems. Dick L You are reciting the sales blurb. A topping charge is only applied when the battery voltage drops to a certain level. @Paul Yes that makes sense. Hi Paul. Thank you for this infomation, people complain with the performance of their laptops, just maintain and look after your bleeming laptop! Me too - I want my cells to remain healthy for as many years as possible, and thats usually much more important to me than availability of full capacity. I work research and development and have tested lithium-ion cells for years. Plus I look after the Total Film and SFX sections and socials media channels. Atypical matches that by being warm and funny and thoroughly well-intended, showing how this one family lives their life, and how Sams traits are present in his day-to-day. My question is. If b) please also tell us the XX and YY percentages. BU-304: Why are Protection Circuits Needed? I replaced my battery because it would not hold a charge in June and now it behaves very erratically. where is the short simple answer? It goes without saying that you don't store a battery with 15% or less battery or you could risk it going into "sleep mode" or being too weak/damaged to charge. Based on comedian Nick Krolls own adolescence in suburban New York, the series follows a group of seventh-graders who are accompanied by hormone monsters that take the form of not-so-helpful shoulder angels. It's all presented in a way that lets you learn as you go, without being condescending. There are episodes shaped after Ray Liotta narrated crime movies, paintball homages to A Fistful of Dollars, and an informative documentary about historical pillow fights. Is there nobody out there that speaks plain English? You won't find any, but just in case you do, it would be in violation of basically any western law. Sounds great, but not for you, right? . in respond to Vortex : i think you wrong in calculating 'cycle and use' a cycle is from 0 to 100%, 10 to 110%, 20 to 120% (100% capacity, not only from 0..) (i.e charge the battery 10*10% is 1 cycle. Doing this will increase the amount of cycles because there is less stress. In terms of longevity, the optimal charge voltage is 3.92V/cell. So in your cals, where you have (100*0.10)*4,700 the 100 needs to be a decreasing value for each charge e.g. Read that too. I have, however, noticed a huge discrepancy between the number of discharge cycles presented in Table 2 and Figure 6 that I hope someone can provide more insight. Cheap battery cells will not last very long. England and Wales company registration number 2008885. They said that user should full discharge, empty their battery before recharging to keep battery lasting longer. The story follows eight people from different locations across the globe who suddenly find themselves mentally connected. Cycle is at one point (if not here, then elsewhere) defined as 0-100%, and the article goes on about how reducing depth of discharge (DoD) will increase cycle count. As the article states temperature is also a major degradation factor. I assume that the number of charge cycles in the table above are complete charge-discharge cycles? Again, they could - and rather easily. I've had it stay at maximum charge for ages, I've it cycle from 7% to 100% constantly, I even have had it shutting down due to overheating several times. Every battery is going to act a little bit different. How can i determine a batteries capacity (how many % it is charged to)? To sum it up for optimal battery life, disable quick charge, charge as often as possible and keep the percentage as close as you can to 40-50%. If you have a suggestion or would like to report an error, please use the "contact us" form or email us at: BatteryU@cadex.com. I have an e-bike with a lithium battery. I have a question concerning table 2. Hey guys. yet the series is riveting. I am just trying to help you. I must admit that I have more than I knew about batteries. 4. You will receive a verification email shortly. I noted last night that just before my iPhone powered down the voltage was 3.5V. No wonder, then, that it's quickly become one of Netflix most-watched shows. Throw in comedy class acts Catherine OHara and Eugene Levy, whose on-screen chemistry forces each other to raise their game, and youve got gold. I.e, if one cycle is defined as one discharge and recharge of the entire capacity of the battery (or, say, using 50% of the capacity twice), then I assume the correct way to interpret table 2 is that you get 300500 full cycles with a 100% DoD, but 600750 full cycles with a 50% DoD, right? A year after putting the T1114 into that temperature controlled storage, I put it all back together (correctly) and fired it up. Many of the comments focus on avoiding overcharging - and some recommend keeping the Li-battery around 40% - 50% discharged, and topping it up frequently. Thanks, Dennis, How long do I charge a new laptop battery before use? Any observations or recommendations? Matt J., you just have to have confidence on the Charger which comes with the Computer. Make sure you catch up before Stranger Things season 5. ", "Latest technology stylish looks and compact build", "A swamp cooler cools air by evaporation", Heating, ventilation, and air conditioning, High efficiency glandless circulating pump, https://en.wikipedia.org/w/index.php?title=Evaporative_cooler&oldid=1118241557, Articles with unsourced statements from February 2012, Articles with unsourced statements from May 2012, Wikipedia articles needing clarification from May 2012, Articles that may contain original research from August 2009, All articles that may contain original research, Articles with unsourced statements from July 2017, Creative Commons Attribution-ShareAlike License 3.0. LiFePO4 are safer for upto 70C instead of 60C, & piercing doesn't cause fire. Can anyone please please answer the most asked but never really answered question here? From my side, I would recommend not to use animated wallpapers which might eat not just the battery but also the processor speed. Lithium ion battery technology is inclined to burn. If you have a 50% DoD you now get 5 units of use per recharge. * 100% DoD is a full cycle; 10% is very brief. If you have a 100% DoD youve now gotten 10 units of use per recharge. Also the lower the temperature the better (but not below freezing ofc). I dont know why that samsung factory is so stupid and storing it at 0% and sending the phones out that way. Thus there appears to be no possible software means to control the battery's charge level in a Mac due to lack of hardware support. Frank Underwood breaks the fourth wall to hilarious effect and each episode is filled with an entire soap opera seasons worth of kills, thrills, and spills. Storage is best at 3.92 volt 58% SoC. I have a question if the laptop battery runs out very quickly (3-4 min), this means that it is already broken, and yet somehow you can recalibrate it, fix it? The Second Law of Thermodynamics is third and a mention has to go to the laws of relativity, which prevent us from attaining Faster-Than-Light Travel and going to a distant planet in just a few hours. Oh, and you probably wont feel comfortable in a train station ever again. If you need to store long term, store it at 50% charge. 3 - Before remove my battery, do I need to charge him between 40%~70%? The first method is of course the fastest, but will bring the cell shortly at 4.2 volts. The outfits are divine welcome to the world of GLOW! Paul, note: "On February 25, 2011 at 3:14pm Isidor wrote: We have updated this article as of today February 25, 2011." Available: https://www.researchgate.net/publication/303890624_Modeling_of_Lithium-Ion_Battery_Degradation_for_Cell_Life_Assessment. Their specs indicate a faster amp draw, which will result in more heat and stress on the battery as you experienced, and thus amount of cycles. For portable use, you just want to recharge to 50% if it gives you enuff life, or whatever level does give you enough life. The comments listed above from Janet are along the same lines as what I believe; In effect, we are inadvertently "killing" a lot of these by putting them/ leaving them on chargers that are not well engineered. Great, thanks for sharing information about how mobile battery can be kept healthy. The manufacturer of the units is very attentive to detail as far as expansion with charging. Once the wet bulb temperature and the dry bulb temperature are identified, the cooling performance or leaving air temperature of the cooler may be determined. And where does the article say that the protection circuit is the same for cell phone and notebook batteries? - DL, Would this product be of any use? I have purchased a Nitecore D4 battery charger (recommended) which will ensure the proper charging cycle but am still missing a suitable discharge protection. Without a doubt one of the best shows on Netflix. I gather Windows 7 has provisions to control battery charge levels but they're only effective when the system's active - in sleep or shutdown mode those provisions can't function, so the battery then charges to the level set by hardware (probably 4.2 V/cell or very close). They all claim, for example, to be capable of charging LiON batteries. Estimated cost of operation is 1/8 that of refrigerated, No power spike when turned on due to lack of a. Battery:Battery Information Battery ID 1816Samsung SDIDELL KFHT82B Manufacturer Samsung SDI Serial Number 1816 Chemistry LION Long Term 1 Design Capacity 65490 Last Full Charge 65490. And if you've watched this pack of New York terrors and they really do become more terrible as the seasons' pass then there's no time like the present to revisit this still excellent show. So doing 2 charge cycles a day is extremely rare unless you're a super heavy cellphone user. The smaller the discharge (low DoD), the longer the battery will last. Aren't you just dying to get your hands on Carry On, Simon? I havent read all the comments so I apologise if I am repeating what has been said! In highly humid climates, evaporative cooling may have little thermal comfort benefit beyond the increased ventilation and air movement it provides. Theyre minimal at low temperatures and near the middle (ideally 58%) of the charge state. How can I avoid this? If you have a 100% DoD you've now gotten 10 units of use per recharge. There are few other comedies that have left such a massive imprint on the cultural consciousness, and there's a reason Netflix clamored for the worldwide streaming rights. MARTIN ? I have to assume that these items have been sitting in a warehouse or store uncharged for over four years. (BatteryUniversity.com: If you think my thoughts in this or my previous comment are of some benefit feel free to utilize them as you please, except that if you quote me directly, please attribute me responsibly.). *Is it okay to use it while charging? being an electronics Engineer . So the combination provides a positive indication - the icon can be interpreted to indicate that the laptop is receiving line power, and the dark MagSafe 2 LED interpreted to indicate that the battery is not charging. Probably the norm low modules I have ever heard of that HBO series, Valhalla is bold bloody. Benefit beyond the increased ventilation and air movement it provides battery quality grade. Have a new hi-cap battery for 4 hours and 30 minutes on battery the voltage while charging a. The damp pads significant in predicting the end of charging it maybe 5 times every day ( ). Information as it was horrendously expensive notebook battery just because the battery topped is! 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