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How to prolong lithium based batteries

batteryuniversity.com

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Re: How to prolong lithium based batteries

#101

Post by theteo »

chasil wrote: post #78
mnw21cam wrote: post #62

I have had my phone for 4.5 years. I charge it every night to 80% - I have Accubattery installed, so it pings to tell me to unplug it, and it also does a fairly decent job of measuring the capacity. I charge on a fast charger (10W) instead of the super-fast charger (18W) because that keeps the temperature from rising too much. I use the phone a fair amount, so I'm usually charging from around 50%. Therefore, the batt…

On Android, I use the "Advanced Charging Controller" module for Magisk. If you have some way of rooting your phone and installing Magisk: https://magiskmanager.com/ Then you can download the ACC module and set it to halt charging at 80%: https://github.com/VR-25/acc This functionality should be native to Android and iOS. Yesterday.

It is with the latest iOS

Re: How to prolong lithium based batteries

#102

Post by coin »

lesinski wrote: post #57

Two unconventional things I do to improve my iPhone's battery health (which follow this article's findings): 1) Don't use a case - Otherwise, you are literally wrapping your phone in a rubber insulator 24/7, increasing its overall temperature. 2) Don't charge at night - Turn off your phone at night. Instead, charge it during the day when you're at your desk. This reduces the number of cycles over years (because your…

> because your phone is continually draining/recharging all night even when you aren't using it

Are you sure of this? What are you basing this on?

Re: How to prolong lithium based batteries

#103

Post by coin »

callalex wrote: post #86
cubefox wrote: post #49

I think all systems that allow for fast charging should, after plugging in, ask: "Do a slow charge instead?" and perhaps: "Only charge to 80%?". These could be two check boxes that are unchecked by default. Maybe you could change the default in the settings. Anyway, the way this is currently solved e.g. in Android is clearly suboptimal. You can only configure charging in the settings, but obviously it depends on your…

Every Apple device (even headphones!) does this by inferring your schedule and charging to 100% just in time or just never if for example you charge your watch every night but only use half the battery. I just wish it was slightly less automatic because it definitely gets tripped up by my occasional insomnia.

The algorithm is very finicky. Often it doesn’t detect the pattern and charges to 100%.

Re: How to prolong lithium based batteries

#104

Post by sitkack »

muzika wrote: post #72
sitkack wrote: post #36

Like making anything last, don't operate at the limits of its envelope. * Limit max temperatures * Reduce maximum currents in and out * For lithium batteries, limit peak charge to 3.92V, do *not* charge to over 4.1V or 30degC I can't find the specific research study, but NASA did a study that last I read was going on for over 30 years with a neglible drop in capacity by only operating in the flat portion of the charg…

3.92V is very conservative, that is a good voltage for long term storage even. It should be safe to charge to 4.05-4.10V regularly.

The NASA research really does support a 4.1V absolute maximum, with every reduction in charge voltage a dramatic increase in battery lifetime.

Re: How to prolong lithium based batteries

#105

Post by Veliladon »

Out_of_Characte wrote: post #94
speedgoose wrote: post #8

I’m not a battery expert but some coworkers from the battery lab at work are, and they say that charging more often is better than doing big cycles. On most chemistries. In more concrete terms, it’s better to keep the state of charge between for example 60 to 30% compared to for example 80% to 15%. Big cycles like 100% to 5% are the most damaging over time.

That defeats the point of having a big battery. You're sacificing battery life to gain battery longevity

Yes and no. A battery's capacity isn't the only variable. You also have internal resistance. If you have a worn out to hell battery where there's dendrites on the anode and you've basically electroplated the cathode the internal resistance is going to be much higher. So if you draw the same current on a worn battery and a new battery the voltage drop is going to be way higher on that worn battery. If you're already at a low state of charge and you vdroop your way below 3.2V under the current load that battery is going to cut the current. Most people notice it as an Android phone that randomly reboots at low battery.

Re: How to prolong lithium based batteries

#106

Post by Veliladon »

speedgoose wrote: post #8

I’m not a battery expert but some coworkers from the battery lab at work are, and they say that charging more often is better than doing big cycles. On most chemistries. In more concrete terms, it’s better to keep the state of charge between for example 60 to 30% compared to for example 80% to 15%. Big cycles like 100% to 5% are the most damaging over time.

You need to do two things to keep a battery healthy: Keep it low current to stop the ions crashing into shit and not stuffing more ions than the anode and cathode matrixes can hold.

If you charge your phone to 100% using a ~4C 60W fast charger you're going to utterly fucking destroy your battery compared to someone who charges to 80% using a 0.5C wireless charger.

Re: How to prolong lithium based batteries

#108

Post by tadfisher »

chasil wrote: post #78
mnw21cam wrote: post #62

I have had my phone for 4.5 years. I charge it every night to 80% - I have Accubattery installed, so it pings to tell me to unplug it, and it also does a fairly decent job of measuring the capacity. I charge on a fast charger (10W) instead of the super-fast charger (18W) because that keeps the temperature from rising too much. I use the phone a fair amount, so I'm usually charging from around 50%. Therefore, the batt…

On Android, I use the "Advanced Charging Controller" module for Magisk. If you have some way of rooting your phone and installing Magisk: https://magiskmanager.com/ Then you can download the ACC module and set it to halt charging at 80%: https://github.com/VR-25/acc This functionality should be native to Android and iOS. Yesterday.

If you charge overnight, newer Androids (12+?) will charge to 80% then trickle-charge to 100% over a few hours before your next alarm. This purportedly gets most of the benefit of lower charge thresholds, presumably because charging that last 20% quickly accelerates wear.

Re: How to prolong lithium based batteries

#109

Post by freehorse »

cubefox wrote: post #81
freehorse wrote: post #53

Earlier quoted context omitted.

I actually have a couple of chargers that just do _exactly_ 5V/1A for this reason.

Yeah, but a software solution would be better and actually easy to implement.

True, that is what _should_ have been done in the first place. But I have given up on companies caring about battery life of products, when their business model is exactly getting their products obsolete as fast as possible for people to get the new product, and hindering self-repair as much as possible.

Re: How to prolong lithium based batteries

#110

Post by lesinski »

coin wrote: post #102
lesinski wrote: post #57

Two unconventional things I do to improve my iPhone's battery health (which follow this article's findings): 1) Don't use a case - Otherwise, you are literally wrapping your phone in a rubber insulator 24/7, increasing its overall temperature. 2) Don't charge at night - Turn off your phone at night. Instead, charge it during the day when you're at your desk. This reduces the number of cycles over years (because your…

> because your phone is continually draining/recharging all night even when you aren't using it Are you sure of this? What are you basing this on?

When the phone is on, it’s powered by the battery.
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