Maybe we should charge battery more often than 50%DoD. Centigrade. From all the information I've gathered over time, this is what I really recommend: Remove your Li-Ion battery if you don't need portability or are not doing anything important on your device (if you don't need backup power in case of a power outage). The advantage is that you can put them in series to directly replace lead-acid batteries, and charge them with standard lead-acid battery chargers. Lithium-ion, like lead-acid, does not benefit from deep discharge - you will get longer life from lithium-ion chemistry by only discharging to 25-30% and re-charging to 80-90% - storing it at full charge (100%) for a long time is also not good - which is the topic of this forum, actually. Why don't manufacturers explain this? Check Price. The voltage should be set to the voltage written on the battery and the max current should be set to 5% of total capacity. I use it without the battery and I keep it at 40%. mark paulo yan --the output voltage from USB is 5.0V ,and the lithium-ion max voltage is 4.2V, this because there is overcharge circuit in the lithium-ion battery to prevent from overing 4.2V. I set a profile to start charging when it drops below 70% and charges only to 90%. They all claim, for example, to be capable of charging LiON batteries. Another thing is that it drains power mostly in stand by. about twice per week. ), or use battery power, but when I am down to 25 - 40% (a big range), plug it in until it reaches maximum? Thank you for this very helpful information. So, 75-65% is actually 3% better than 100-25% when both have gone through same amount of discharging/charging units. I felt very pleased. and how to create one lithiyam ion battrey on charging pls tell me. I take a coach / train journey every few weeks which lasts approx 2 hours. I think your expecting to use 2,190 - 3,650 cycles is incredibly high. Type powercfg /batteryreport and press Enter on your keyboard. So maybe 45 - 35 percent? Proof lies in the numbers itself: 100% * 500 cycles = 50.000% total charge 10% * 4700 cycles = 47.000% total charge Discharging a battery by 100% nets more charge over the battery's life than only using it up by 10%. Please be constructive as others are. Keeping the battery charged to Make sure you take them out once in a while (every month, few months or so) to check they still have charge in them and charge them back up to storage capacity if they are too low.
battery They still don't overheat or start fires. Peter. as mentioned earlier. And The smaller the discharge (low DoD), the longer the battery will last. A dominant theme in these public comments seems to be a desire for maximum cell life management. It's still less than 1C charge rate on my Galaxy S7 Edge, so I think it's ok as long as the heat is in check so I tend to use it when I'm in a hurry or have a fan to cool my phone while charging. So I concur with the article. In general in every software if it is possible to have total pitch black background I go for it. It's not marketing sales literature. 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. 1 cycle is a full discharge from 100% to 0%. You don't want to go crazy with your laptop's charge level. At the rate I use the battery, will it last another 7 years? Wasn't it nice of derp to drop by, making use all feel better about ourselves. Here's the question. So does that mean we should be cycling our batteries between 58% and 50%? My previous phone was Nexus 5, but the voltage while charging was also above 4.3V, I believe. The voltage level of these two batteries is nearly identical at low currents. Industry, on the other hand, is more concerned about longevity and may choose lower voltage thresholds. Perhaps some device manufacturers are preventing deep discharges, so the advice to not discharge too far may need to be taken with a grain of salt if you're using a device that has already taken this into account. I think there ais a big misunderstanding when we try to select the best choice for charging cycle of our litium batteries. According to SOK battery tech support, this information does not apply to their LiFePo4 batteries or that chemistry in general. Your words: "No, he should NOT wait until the battery is discharged to 11% That would be one of the deep discharges that shortens battery life." Best for Battery mode moves that target lower between 50% and 60%. wat about over charging? ), so therefore I would have to recharge it with the laptop on. My Toshiba laptop and cell phone batteries will serve me longer and stronger. Our 330 stalls will cost over C$400,000 to fully wire, without chargers mind you. Big kudos for Sony! For unknown reasons, real-life expectancy tends to be lower than in simulated modeling(See BU-208: Cycling Performance). Most users do not remove the AC power, and this practice is safe. A DC-DC charger (also known as a battery-to-battery charger, or b2b charger) is a device that takes the input from your alternator/starting battery and uses it to charge your aux battery. When you consider the cost versus the lifetime of these packs they are not that expensive, baby them and get say 12 months against using them without worrying about longevity, but not abusing them, and getting 9 months, say you pay $60 for the battery, thats $5 a month babying against $6.66 a month without worrying, is all the fuss worth $1.66 a month ? In other words, what is the depth of discharge when I go from 75% charge to 25% charge? No need to worry, just look at percentage, 100% is still 100%. This is practical because batteries should retain some reserve before charge under normal use(See BU-501: Basics about Discharging, What Constitutes a Discharge Cycle) The cycle count on DST (dynamic stress test) differs with battery type, charge time, loading protocol and operating temperature. Theyre minimal at low temperatures and near the middle (ideally 58%) of the charge state. Thanks Edward. Not such great news. I have a feeling that 100% will be worse than 0%. Glad to discuss, please email me with contact information if possible. I don't know if you will read this since this is a couple weeks late but I'll reply anyways since it might be helpful to others. I have a ASUS laptop and it's advertised battery backup time is ~ 3-4 hours. By doing this all the time, BatteryBar Pro registers the minimum amount of wear. There was a military study done on it, it was on Tesla forums but I don't remember the link. And its advisable to have lower than 4.20 right? It is clear from the figure that relation between charging cycle and capacity is linear for a specific charging/discharging rate. what can i do to stop this? I still don't know what to do? what this ."article" acctually tells you is: 1) it is not recomended to keep your battery plugged in when fully charged for a long time periods.2)it is not neccessary to always fully discharge the LI battery(you can charge it anytime to any%). Look at my comments above. At the top of the report, basic information about your computer and battery will be listed. The equipment would then be left plugged to a mains supply as much as possible. A fully charged LiFePO4 battery should maintain its voltage for a long time without dropping significantly. $27.99 $ 27. Please HELP!!!!!! This works out to a charging voltage of 3.55 to 3.65 volts per cell. Yes Vollrathd, the pack that I have is for my transmitter, it replaces my 8 AA box and I figured this would be the best replacement for that application because of what my research told me about life packs. You mention that the battery is a 3.8 volts 250mAh cell but i think the 3.8 refers to the nominal voltage. For accessible cells such as in common LED flashlights, you might have full control, or nearly so. However, the battery monitor pro app currently estimates it's capacity as 2143mah so doesn't seem to have affected it. The 1,500mAh pouch cells for mobile phones were first charged at a current of 1,500mA (1C) to 4.20V/cell and then allowed to saturate to 0.05C (75mA) as part of the full charge saturation. The Dreamliner battery was a lithium cobalt oxide type. Discharging the battery 10 times by 50% (let's say from 100 to 50 percents) gives the device the energy equivalent to 5 full 100% discharge, or 5C, "5 batteries", to say :) I'll try to calculate this energy from the data plotted in "Figure 6: Capacity loss when operating Li-ion within given charge and discharge bandwidths". I'm guessing Li-Ion battery research has changed the way we treat Li-Ion batteries in the last 6 years? The battery has been used and abused. 100 25 75 81.5 18.5 3000 6.2 A 2C battery would need just half an hour to load 100 Ah, while a 0.5C battery requires two hours. Are they BSing me or can this be true??? Hence battery manufacturers are obliged to manufacture to the lowest acceptable standards. Explain? I have a 4400mAh Li-Ion laptop battery from Batteries Plus. Thank you Paul! You can recharge it 2500 times youve now gotten 6250 units of use from the battery. I would certainly not recommend discharging any of these chemistries small amounts between recharges. 1) Using a charge controller and a 5V solar panel - thus fully charging the batteries each sunny day 2) Using no charge controller and a 4V solar panel - thus never fully charging the batteries and having my voltage float up and down each day (never a complete cycle) Naturally both would need over discharge protection. BU-103a: Battery Breakthroughs: Myth or Fact? being an electronics Engineer . Are current smartphones' batteries are different from ones that are described in the article? From the table in the article, the 50% DoD gives you the most number of hours out of the battery before it cannot get above 70%. Their results show that you must compromise between better battery longevity or a larger usable capacity in a battery. I have read the whole book" Batteries in a Portable World" and I would recommend it to anyone who would like to have a better understanding of batteries and the characteristics of each chemistry. Fully charged is 3.6v per cell quickly dropping to 3.3v/cell. The text even says so itself. 1. :) thanks genesis, i will do as you said, hopefully my battery will survive another year :D. people,please..do not take everything you read on internet as a must. Run down from 60%. 7565% - Black Line The system will consume less power when the average processor utilization is very low. You are very correct - most people will get a new phone at or around 2-3 years. I immediately checked the date on the two lithium-ion batteries enclosed and found it to be 10 2006. So looking at these four values, the 25% DoD seems to be the best, but more values would be helpful. There has to be a better way. I am hoping that by and by, the weighted cycle lifespan will displace the presently used numerical cycle lifespan. 2. Not without an explicit guarantee. On one of them, when checking the BIOS information, there is an option under Power Management, Primary Battery Charge Configuration, which says "Primarily AC Use" and then explains that this option "Extends battery lifespan for users who primarily operate their system while plugged into an external power source." First, from reading the comments and seeing that there is not 100% agreement on the "do's and don'ts", it would seem to me there is a missing factor, which I would respectfully suggest is manufacturing quality of the battery. Thank you so much for this useful article! The table shows numbers of cycles for different DoD. Really great info in this article - much appreciated. Paul, I read the article and am saying that my 20+ years of experience with rechargeable batteries disagrees with one primary implication: The article implies that many partial cycles will allow the battery to keep full capacity longer.
18650 Battery My phone stayed the same (design capacity). USE THE MANUFACTURER'S CHARGER AND ALLOW THE CHARGE TO COMPLETE MOST OF THE TIME. Turn on What is going on? It has a built-in battery so removal is not an option. A device with Lithium batteries (especially Li-ion & Li-Polymer/LiPo) should not be left connected to chargers for >1 month unattended. So it seems if you connect cells in series, you find the Wh of each cell before adding it.
charge Thanking you kindly for your help. This would mean that 400 Discharge Cycles at 80% DoD, would have delivered 400*80 = 32000 Units. One of them (mine) was charged using the 40-80 method, while the other one was used normally. I removed battery for a number of hours. Do you believe this to be a coincidence or quality factor. 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. you buy a new laptop after turning on discharge to 10%, recharge fully to 100% form there on discharge to no further then 40%, recharge no further than 80% once a month discharge to 10% and then recharge to 100%. Let me know. Now the battery swelled and the charge capacitive drop seriously. (I was looking there to find Information about the LiPo4 and NMC lifetime, but the tables there show the same cycle life for LiFePo4 and NMC) Thanks! @ 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. i agree, its better to be sure. I already use a surge protector but I think this only works in case of extreme peaks, right? I did ask the laptop manufacturer (Acer) but it was horrendously expensive. The battery charger is within the laptop. My question is, is this normal? So from above, this battery should last a goof 5-7 years - far more than the 1 year the manufacture's warranty! What am I not interpreting correctly? Sir, my question is this is there any 'gauge' or IC that I can add to the charger to shot down current entering the battery to avoid the same over charging when the battery is full. *Is it okay to use it while charging? The removal of my Toshiba battery is quite complicated: it is necessary to open the case unscrewing 14 screws and remove the dvd unit. If the remaining capacity is below 25%, recharge it until it reaches 40% and then store it until the next utilization. Does this 'discharge cycle' in each row denote the same complete 1 Cycle(100% amount discharged and charged, not necessarily in one go) as we understand in battery terminology. Any help would be greatly appreciated. Thanks for any replies. THAT IS WHY IT IS VERY IMPORTANT THAT BATTERY IS 100% REMOVABLE "DONT BUY BATTERY THAT IS NOT 100% REMOVABLE.". A fully charged LiFePO4 battery typically has a
LiFe Battery Charging They said that user should full discharge, empty their battery before recharging to keep battery lasting longer. Who buys a horrendously expensive notebook battery just because the battery only delivers 5 hours of work time instead of 7? You can test it now, start discharging the battery to 0%, you will notice a significant improvement in your performance. If the battery is full and there is still solar light, it will continue to charge the batterty. That's because I don't know if there's any universal charger/discharger that I can use to control how much charge/discharge I want to apply to a li-ion battery before I store them. But because of reduced capacity at this range, a more realistic and practical operating range would be between 25-75%. as s6 edge has 9 volts battery? my question is that i have s6 edge, i want to expend his battery life as long so what can i do, which percent age % i can charge my phone 15 or 40 % to till 100% percent please tell me about this situation. So what are you saying Pavlo? Given what the article says, would it not be best to cycle charge between 10%-60% for example ? Are good on not? I don't have any proof of this but it makes it easy to think about. Thanks for this information. High voltages and exposure to elevated temperature is said to degrade the battery quicker than cycling under normal condition. I am afraid you are bit too technical for me! This is a nasty test but LiFePO4 does it more safely than traditional Li-ion as the presentation makes clear. I just recently found that you can stop charging a Macbook that use Magsafe2 connector (probably same with Magsafe1) by blocking the center pin which is used for signaling. At one time, I too, was ignorant. If you need a longer run time, charge to a higher percentage then drain to 10% for maximum capacity at the cost of reduced life. #3: Usage patterns and environmental (heat) considerations. Andy - I am not going to join this discussion about lithium ion but I think I might be able to throw some light on the lead-acid situation. In Table 2, where you have shown Discharge cycles against a DoD. So, even if the words you laid in my mouth were actually uttered by me, I'd still be right due to the fact that you didn't analyze what you argued with. Why should we users bother on these details?? SHOULD BE 4.500 / 9.000??? 4.2 to 4.1). good site, this one. In my opinion, "doubling" the lifetime should mean doubling the time it takes for the battery to drop down to 700mAh of usable capacity. For a 3.85v battery, 4.4v is at 100%. Save In List. to 11%. 99. If you have a 50% DoD you now get 5 units of use per recharge. This moves as many ions as possible from one electrode to the other keeping them free to move instead of "stubbornly stuck". Can anyone please please answer the most asked but never really answered question here? James, I strongly doubt Boeing used LiFePO4 technology - it's relatively new and the 787 was in design for many years. Wh is equal to V x Ah. please can you help me solve this problem because if I am watching a film I can`t just stop it and carry on watching it few hours later. peter, You said they were wrong, gave an opinion, did not explain, were not constructive. Heck my 3DS has been on for 3 days and still has 2/3 charge, tho a lot was in standby mode. is that clear. So just charge your battery Preferably with your Laptop off till it attains 100%. Charge it up to 90%+ when you are going to use it. Figure 1 illustrates the capacity drop of 11 Li-polymer batteries that have been cycled at a Cadex laboratory. After 3 years how to extend the initial research battery7, finding that the depth of life, you can discharge up to 2, and for you to have an idea, a smartphone turned off. Not only is this untrue, it also completely defeats the purpose of having a portable device in the first place. I hope someone can provide more insight. That way you are safe. the HDD is put to sleep after 20 minutes of inactivity. 1. The background is full black, screensaver is full black, browser background is full black. The battery you bought has a 90 day warranty. Most of the modern gadgets that use Li-ion battery have smart charger that will cut off when the battery is fully charged. I don't ever use the charger that connects to the phone-just a cube-style charger that plugs in to the wall; leave it overnight, and then take it with me. I'd pretty much call a battery that has reached its end "dead". A threshold of 30% would be much more realistic and would probably show that the 100% discharge nets much more charge than the 10% one. I have a MacBook Air but I use it as a laptop - connected to power, its battery always at 100% How often should I disconnect it and how deep let the battery discharge? Long story short, what exactly should I do: a) Never let it go under 40% or over 70%//40%-80%//20%-80%// 50%-80% b) Keep it between 70% and 90-95%? Many articles are written about charging Li-on batteries, but I am surprised nobody seems to have come up with a method of safeguarding against over discharge. (All values are estimated; Energy Cells with higher voltage thresholds may deviate.). This will ensure that your battery is always in working condition Nothing to do when your battery is fully charged. It is about 1.5years old. 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. We often ignore basic things and we have to repent for those. It all depends on the quality and grade of the battery cells. 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). if you buy a charger, make sure it matches the specifications and it is from the same company as that of the Computer. I'll have to get a voltmeter to test the cell, but I'm guessing that during storage, the cell somehow self discharged to zero volts, despite being disconnected from the T1114 (there is a third wire coming from the cell package, probably a thermal circuit uses the battery and outputs temperature data on the third wire). Go to supermarket, pick up something from the fresh produce section. Or does using the battery in a cold or frozen state cause the dammage? Cycling in mid-state-of-charge would have best longevity. In the same article it says that the ideal charge voltage is 3.92V, representing a capacity of 58%. I have a ThinkPad W520, and since the mains adapter is a brick 17cm x 8cm x 3.5cm weighing 750g (6.7"x 3.2" x 1.3" weighing 1.64 lbs) I figured from suggestions on thinkpads.com Support Community (http://forum.thinkpads.com/viewtopic.php?p=628326) that I can equally use a smaller mains Adapter also available from Lenovo. Just go to Google search and you will see hordes of articles and blogs on Lithium batteries ~ on how to maintain them, charging etc.WHATEVER INFORMATION I AM POSTING HERE IS NOT HEARSAY ~ THEY ARE BASED ON MY PERSONAL EXPERIENCE AND CONFIRMED BY H P . "full discharge" to about 2.7V (0% state of charge) is normal. Don't do this, don't do that. Never said you did. (Compared to 30% for lead acid batteries). I have not had problems with previous phones when it comes to battery life. We know from this article that "full" is something like 4.2V or 4.35V. Put a flat battery on charge immediately you get home and its tolerable practice. But please use your battery atleast once in a month. This sulfation causes a permanent loss of capacity of the battery. Battery lifespan. I use it then on battery power. The first charge cycle or two disapates this stabilisation, hence the need to cycle the battery a few times to get full capacity Colin, Ref your E bike battery. Much more cycles but with less energy transferred to the device in a single cycle. Same question for discharging a battery which also gets hot during de-charging. I charged it with a laptop charged output of 19.5v, 3.33A. and what is recommended range of charging for S7`s kind of battery? Also i think feanor is wrong: using device while charging is not good for battery life coz battery is making a lot of micro cycles and wearing battery. After desoldering all wires leave it like that for 10 seconds than resolder the wires back to where they were. Andre If you never charge it to 100%, what about when you want to use just battery power?
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