..Dhiru had installed new drivers for battery in alpha 4, which was in an experimental stage, and hence we were warned not to overcharge the battery.
..is it ok to overcharge now that alpha 5 (remics jb 5.7.2) is out? I have the habit of charging overnight which is for about 8hrs everyday
^ Li-Ion batteries cannot be overcharged. There's an overcharge protection circuit that prevents this from happening.
Overcharged Li-ion batteries can explode and cause damage.
http://computer.howstuffworks.com/laptop-battery-overcharged.htm
Related
I always keep my pda in the cradle charging whenever I can (most of an average day) just like the instructions say so. A guy I work with says it's better for battery life to discharge them (near) fully and then recharge.
My battery life is now very short (after about 10 months use) and I am going to buy a replacement. Anyone know for sure which is the best way to keep batteries in good shape?
Thanks in advance ... Dr Firstpost
http://www.batteryuniversity.com/parttwo-34.htm
How to prolong lithium-based batteries
Battery research is focusing heavily on lithium chemistries, so much so that one could presume that all portable devices will be powered with lithium-ion batteries in the future. In many ways, lithium-ion is superior to nickel and lead-based chemistries and the applications for lithium-ion batteries are growing as a result.
Lithium-ion has not yet fully matured and is being improved continuously. New metal and chemical combinations are being tried every six months to increase energy density and prolong service life. The improvements in longevity after each change will not be known for a few years.
A lithium-ion battery provides 300-500 discharge/charge cycles. The battery prefers a partial rather than a full discharge. Frequent full discharges should be avoided when possible. Instead, charge the battery more often or use a larger battery. There is no concern of memory when applying unscheduled charges.
Although lithium-ion is memory-free in terms of performance deterioration, batteries with fuel gauges exhibit what engineers refer to as "digital memory". Here is the reason: Short discharges with subsequent recharges do not provide the periodic calibration needed to synchronize the fuel gauge with the battery's state-of-charge. A deliberate full discharge and recharge every 30 charges corrects this problem. Letting the battery run down to the cut-off point in the equipment will do this. If ignored, the fuel gauge will become increasingly less accurate. (Read more in 'Choosing the right battery for portable computing', Part Two.)
Aging of lithium-ion is an issue that is often ignored. Depending on the state-of-charge and storage temperature, lithium-based batteries have a typical lifetime of 2-3 years (longer if partially charged and kept cool). The clock starts ticking as soon as the battery comes off the manufacturing line. The capacity loss manifests itself in increased internal resistance caused by oxidation. Eventually, the cell resistance will reach a point where the pack can no longer deliver the stored energy, although the battery may still contain ample charge. Increasing internal resistance is common to cobalt-based lithium-ion, a chemistry that is found in laptops and cell phones. The lower energy dense manganese-based lithium-ion, also known as spinel, maintains the internal resistance through its life but loses capacity due to chemical decompositions.
The speed by which lithium-ion ages is governed by temperature and state-of-charge. Figure 1 illustrates the capacity loss as a function of these two parameters.
Figure 1: Permanent capacity loss of lithium-ion as a function of temperature and charge level.
High charge levels and elevated temperatures hasten permanent capacity loss. Improvements in chemistry have increased the storage performance of lithium-ion batteries.
There are no remedies to restore lithium-ion once worn out. A momentary improvement in performance is noticeable when heating up the battery. This lowers the internal resistance but the condition reverts back to its former state when the temperature drops.
If possible, store the battery in a cool place at about a 40% state-of-charge. Some reserve charge is needed to keep the battery and its protection circuit operational during prolonged storage. The most harmful combination is full charge at high temperature. This is the case when placing a cell phone or spare battery in a hot car. Running a laptop computer on the mains has a similar temperature problem. While the battery is kept fully charged, the inside temperature during operation rises to 45°C (113°F).
Removing the battery from the laptop when running on fixed power protects the battery from heat but some battery and laptop manufacturers caution against it. They say that dust and moisture accumulating inside the battery casing could damage the laptop. The dealers will be happy to provide you with a new pack when a replacement is needed a little sooner.
The question is often asked, should the laptop be disconnected from the main when not in use? With lithium-ion it does not matter. Once the battery is fully charged, no further charge is applied. It is recommended, however, to turn the laptop off overnight because heat harms the battery.
A large number of lithium-ion batteries for cell phones are being discarded under the warranty return policy. Some failed batteries are sent to service centers or the manufacturer, where they are refurbished. Studies show that 80%-90% of the returned batteries can be repaired and returned to service.
Some lithium-ion batteries fail due to excessive low discharge. If discharged below 2.5 volts per cell, the internal safety circuit opens and the battery appears dead. A charge with the original charger is no longer possible. Some battery analyzers (Cadex) feature a boost function that reactivates the protection circuit of a failed battery and enables a recharge. However, if the cell voltage has fallen below 1.5V/cell and has remained in that state for a few days, a recharge should be avoided because of safety concerns. To prevent failure, never store the battery fully discharged. Apply some charge before storage, and then charge fully before use.
All personal computers (and some other electronic devices) contain a battery for memory back up. This battery is commonly a small non-rechargeable lithium cell, which provides a small current when the device is turned off. The PC uses the battery to retain certain information when the power is off. These are the BIOS settings, current date and time, as well as resource assignment for Plug and Play systems. Storage does shorten the service life of the backup battery to a few years. Some say 1-2 years. By keeping the computer connected to the main, albeit turned off, a battery on the PC motherboards should be good for 5-7 years. A PC should give the advanced warning when battery gets low. A dead back-up battery will wipe out the volatile memory and erase certain settings. After battery is replaced, the PC should again be operational.
Simple Guidelines
Avoid frequent full discharges because this puts additional strain on the battery. Several partial discharges with frequent recharges are better for lithium-ion than one deep one. Recharging a partially charged lithium-ion does not cause harm because there is no memory. (In this respect, lithium-ion differs from nickel-based batteries.) Short battery life in a laptop is mainly cause by heat rather than charge / discharge patterns.
Batteries with fuel gauge (laptops) should be calibrated by applying a deliberate full discharge once every 30 charges. Running the pack down in the equipment does this. If ignored, the fuel gauge will become increasingly less accurate and in some cases cut off the device prematurely.
Keep the lithium-ion battery cool. Avoid a hot car. For prolonged storage, keep the battery at a 40% charge level.
Consider removing the battery from a laptop when running on fixed power. (Some laptop manufacturers are concerned about dust and moisture accumulating inside the battery casing.)
Avoid purchasing spare lithium-ion batteries for later use. Observe manufacturing date. Do not buy old stock, even if sold at clearance prices.
If you have a spare lithium-ion battery, use one to the fullest and keep the other cool by placing it in the refrigerator. Do not freeze the battery. For best results, store the battery at 40% state-of-charge.
_________________________
Created: February 2003, Last edited: June 2005
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About the Author
Isidor Buchmann is the founder and CEO of Cadex Electronics Inc
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V
The short answer.
No. Lithium batteries prefer to be topped up frequently and don't like being fully discharged.
Thanks TheBrit :wink:
Just to add - you can do damage to a lithium battery by entirely discharging it, so don't. Top up away. But expect to replace after a couple of years!
V
Thanks for the replys & detail.
Maybe my batteries are suffering from 'digital memory' - they have hardly ever been run down to device switch-off. For my new ones I'll try fully discharging every 30 recharges as suggested and see how that goes.
I'll post results of test in a years time!
I don't believe in topping them constantly. A friend and I bought our new phones 2 weeks apart from each other. I always heard to discharge them before charging, he on the other hand never cared. Just 6 months in now, his dies in 2 hours or less, with light use. I am playing music, surfing FB etc. all day long. Right now at 15 hours discharging and still 40% battery. He has charged his 5 times today due to phone going into low battery life, and only been up 11 hours.
It only happens with the Niquel-Cadmium not with the Lithium
jrodcamaro said:
I don't believe in topping them constantly. A friend and I bought our new phones 2 weeks apart from each other. I always heard to discharge them before charging, he on the other hand never cared. Just 6 months in now, his dies in 2 hours or less, with light use. I am playing music, surfing FB etc. all day long. Right now at 15 hours discharging and still 40% battery. He has charged his 5 times today due to phone going into low battery life, and only been up 11 hours.
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Wut
If you like to deep-cycle (fully drain/recharge) their battery, you should stop doing that. Many of us got used to deep-cycling the Ni-Cd batteries, and didn't notice the smooth transition to Li-Ion batteries.
In fact, I can't think of a phone (or any other gadget) that would use Ni-Cd battery today. AFAIK, all modern phones/PDAs have Li-Ion batteries (including Raphael) which you SHOULD NOT fully discharge.
Here's a quote from wikipedia.org (http://en.wikipedia.org/wiki/Li-ion_battery):
Like many rechargeable batteries, lithium-ion batteries should be charged early and often. However, if they are not used for a long time, they should be brought to a charge level of around 40%–60%
Lithium-ion batteries should not be frequently discharged fully and recharged ("deep-cycled"), but this may be necessary after about every 30th recharge to recalibrate any electronic charge monitor (e.g. a battery meter). This allows the monitoring electronics to more accurately estimate battery charge.[27] This has nothing to do with the memory effect.
Li-ion batteries should never be depleted to below their minimum voltage, 2.4 V to 3.0 V per cell.
Li-ion batteries should be kept cool. Ideally they are stored in a refrigerator. Aging will take its toll much faster at high temperatures. The high temperatures found in cars cause lithium-ion batteries to degrade rapidly.
Li-ion batteries should not be frozen [50] (most lithium-ion battery electrolytes freeze at approximately −40 °C; however, this is much colder than the lowest temperature reached by household freezers).
Li-ion batteries should be bought only when needed, because the aging process begins as soon as the battery is manufactured.[27]
When using a notebook computer running from fixed line power over extended periods, consider removing the battery[51] and storing it in a cool place so that it is not affected by the heat produced by the computer.
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Hope this helps someone.
http://www.popularmechanics.com/technology/gadgets/tools/science-of-battery-life-in-electronics
Cliff note:
Keeping the battery between 20-80% will make it LIVE the longest.
Makes sense
Awesome article, thanks for the thread.
Sent from my LG-P999 using XDA App
If I read the article right, I should not leave my phone plugged in over night? If i don't that it will be drained when i wake up in the morning.
donbeth said:
If I read the article right, I should not leave my phone plugged in over night? If i don't that it will be drained when i wake up in the morning.
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Your phone will stop charging when it reaches 100%. Don't believe anyone saying an 8 hour, or overnight charge is needed when it comes to lithium batteries. Over charging and over discharging lithium batteries is dangerous which is why they have built in circuits to prevent this.
yeah, After having purchased an electric bike kit last year, I've studied up alot on lithium batteries, and the article and it's author doesn't mention anything about a BMS (or battery management system).
I'm sure every cellphone has a BMS making sure that the battery does not overcharge or undercharge. It will either stop charging the battery and will shut off the device when battery gets critical. 100% charge does not mean 100% but actually is 80% then the BMS stops charging, and 0% is actually 20% then BMS shuts of device.
Yes you shouldn't be doing a "full discharge" on lithium batteries, and yes you shouldn't leave the battery on the charger for more than a week (overnight is fine is you're charging on a daily basis though)
The best way to exercise and increase a lithium batteries total life cycle from say an OEM suggested life time of 500 cycles to upwards of 3000 cycles, is to start recharging at about 50%. This way you extend the batteries life. Hope this helps.
Has anyone got any good tips on getting the most out of the battery in the long term.
Is it better to charge at 10% 50%?
Should I power off at night?
HTC wildfire cyanogenmod nightly
hboot -1.01 s-off xtc clip
doesnt matter, do whatever.
Yepp, that's it. Li-Ion batteries do not need any kind of maintenance, you can charge and discharge as you please. There are only two ways of shortening the life of a Li-Ion-battery:
Overcharging (makes it burst; happend with some Sony-batteries in the past due to defective hardware)
Complete discharging
Both situations cannot happen to your Xoom battery because the built-in charge controller will stop charging before 100% are reached and it will shut down the device before the battery is all drained.
In my S9+ I have the option to Disable fast charging.I have enough time to charge & can enable it Only When I need it.If Not Does it have adverse affect on battery?In iOS 13 Apple has further gave the option for slow charging.Also I find That in PES 2019 when I flick on screen to pass to a player,It sometimes misses.Is there a way to increase touch sensitivity like in S9+
I switched from Xs Max & touch was very sensitive
Can I use apple 5W charger to charge slow or will it have an adverse effect?
Bump
Use a different charge block if you want slower charging. Are you using an aftermarket screen protector? May i ask why you wan to disable warp?
equlizer said:
Use a different charge block if you want slower charging. Are you using an aftermarket screen protector? May i ask why you wan to disable warp?
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No I'm using it with the screen protector that came pre installed.I want to use this phone for long time & don't want any adverse affect due to warp charge
RISHI RAJ said:
In my S9+ I have the option to Disable fast charging.I have enough time to charge & can enable it Only When I need it.If Not Does it have adverse affect on battery?In iOS 13 Apple has further gave the option for slow charging.Also I find That in PES 2019 when I flick on screen to pass to a player,It sometimes misses.Is there a way to increase touch sensitivity like in S9+
I switched from Xs Max & touch was very sensitive
Can I use apple 5W charger to charge slow or will it have an adverse effect?
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One good thing about the Warp Charger is that it converts the energy in the brick itself instead of the device (in case of huawei , which does this in the device itself). So yeah warp charge isn't harmful in long term.
https://www.youtube.com/watch?v=uHNG-UYSwSo
daniel from xda explained this here.
This is what you want for preserving battery. Lithium batteries hate overcharging and constant recharging.
https://play.google.com/store/apps/details?id=com.slash.batterychargelimit
larsdennert said:
This is what you want for preserving battery. Lithium batteries hate overcharging and constant recharging.
https://play.google.com/store/apps/details?id=com.slash.batterychargelimit
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This is an incorrect statement. Li-Ion batteries last longer the more often you charge them. Charging from 0-25% you will get 250-350 charge cycles, 25-50% you should get 500-600 charge cycles, 50-75% up to 800-900 charge cycles and charging routinely at 75% or higher you can get as many as 1000+ charge cycles. This is before you see significant reduction in battery capacity.
What Li-Ion batteries hate is a deep depth of discharge . It is harmful to let a Li-Ion battery to drain to under 10% battery. This is from BatteryUniveristy.com
The other statement is correct, the brick is where all the real circuitry is and protects the battery from over heating. It's the heat that kills batteries.
I meant continual charging while full. IE 99% to 100% continually. Over discharging and heat kill them too. Leaving them partially charged affords them the best life. Tesla's also do this not charging to 100% daily for longer battery life.
kirito05 said:
One good thing about the Warp Charger is that it converts the energy in the brick itself instead of the device (in case of huawei , which does this in the device itself). So yeah warp charge isn't harmful in long term.
https://www.youtube.com/watch?v=uHNG-UYSwSo
daniel from xda explained this here.
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Charging at 1.25C is commonly accepted as "no good" for batteries.
Folks worry too much about long term battery life. I used my 3T for over 2 years with the stock Dash charger. Never seemed to lose any significant battery performance compared to when it was brand new.
After 8 years of using phones with 10 watts or less, even 5v 0.7a chargers, those phones got horrible battery life after a year or so, then my old Op5t and 6 of my wife are both holding strong after a solid year of use with 15W charger. Don't listen to Apple much, they don't care about lying their consumer to then prove themselves wrong a few year later. iP10XSM nearly 4 hours to charge, supports fast charging yet you have to buy the charger. Then next iPhone may come with fast charger included, not before some profit from chargers.
larsdennert said:
I meant continual charging while full. IE 99% to 100% continually. Over discharging and heat kill them too. Leaving them partially charged affords them the best life. Tesla's also do this not charging to 100% daily for longer battery life.
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Dude, after about 85%, the charger will trickle charger. Nowadays phone batteries are very smart, they don't overcharge. When it reaches 100%, it stops charging and keeps it at %100 by trickle charging. It's not harmful at all.
Ppl need to stop worrying and spreading false information.
What you don't want to do is to discharge to under 10% then charge to 100% and repeat. Now that's pretty bad for the Li-Ion battery.
Android has software safeguards as well as a physical charge controller by the battery that keeps the battery from overcharging. Overcharging is not a problem anymore.
No sir, it is you who does not understand battery chemistry. I have plenty of experience using Lithium batteries in high stress situations. 100% in a cell phone is 4.2v. Anything over 4.1v is technically overcharged for the chemistry and 3.9v is optimal.
Trickle charging the last bit is a balance issue even in a 1s cell to avoid even more overcharging otherwise Lithium can handle very high rates.
If someone is concerned with charging to 4.2v the app i pointed out is your solution. I don't believe warp charge itself causes any harm to a battery but at 1c or 4ah charge rate is the safe limit and warp could be delivering 6A on occasion to this battery.
larsdennert said:
I meant continual charging while full. IE 99% to 100% continually. Over discharging and heat kill them too. Leaving them partially charged affords them the best life. Tesla's also do this not charging to 100% daily for longer battery life.
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None of these phones have an issue if you leave them plugged in. The have a circuit that keeps the battery from charging when full. It stops charging and every few minutes it will let charge very slowly to keep it topped off. No damage to the phone or battery will happen.
---------- Post added at 01:54 AM ---------- Previous post was at 01:46 AM ----------
larsdennert said:
No sir, it is you who does not understand battery chemistry. I have plenty of experience using Lithium batteries in high stress situations. 100% in a cell phone is 4.2v. Anything over 4.1v is technically overcharged for the chemistry and 3.9v is optimal.
Trickle charging the last bit is a balance issue even in a 1s cell to avoid even more overcharging otherwise Lithium can handle very high rates.
If someone is concerned with charging to 4.2v the app i pointed out is your solution. I don't believe warp charge itself causes any harm to a battery but at 1c or 4ah charge rate is the safe limit and warp could be delivering 6A on occasion to this battery.
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GO back and read my first post in this thread. After reading that and I generally get home with over 50-60% battery. My batteries on the OP5 and OP6 after 1 year, I upgrade every year, only lost about 4-5% total battery capacity. I see people all the time complaining they are already seeing loss of 15-20% battery capacity and it's how they charge and treat their batteries.
Leaving aside the debate of battery health. I accidentaly discovered that if you Flash the latest magisk canary zip, something gets bugged and Warp charge stops functioning. Only regular charge at 1500 mah Is possible. Flashing stable magisk again gestores Warp charge just FYI.