Smartphone and Cellphone Wars

**dr. d** · November 5th, 2017 12:59 AM

Originally Posted by oj88

IMO, not charging to 100% is only advisable if you plan to store the device for months on end. But for a “daily driver” of a phone, it’s fine to charge it overnight to 100%. Statistically, at least based on my experience with my own devices, the batterry still outlasts my device’ useful life of approx. 2-5 years.

My Palm T|X for instance, is more than a decade old and it’s still working. The battry retention is probably down to 25% from when it was new but it doesn’t matter since the product is obsolete. I’m just keeping it for nostalgia and novelty.

My Phantom 3 drone smart batteries are set to auto-discharge to around 60% when not used for more than 2 days. I’ve set it as such because I don’t get to use it much. Every few months, I charge it up to full, do some flights, charge it again to full, store it and let the auto-discharge kick in.

OT.
i also have my Palm still.
i tried giving it away.
no dice. no one wanted it.

**StockEngine** · November 5th, 2017 01:09 AM

who has time to prevent charging phones to 100%??? 🤣

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**WallyWest** · November 5th, 2017 01:41 AM

Originally Posted by BratPAQ

Read this too from somewhere. I don't remember the science behind it though.

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Heat.

When a lithium ion battery is at very low voltage, it draws a lot of current. Drawing lots of current produces heat.

Charging it past full also generates heat since the energy that can no longer be absorbed by the cells turns to heat.

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**BratPAQ** · November 5th, 2017 01:46 AM

Originally Posted by WallyWest

Heat.

When a lithium ion battery is at very low voltage, it draws a lot of current. Drawing lots of current produces heat.

Charging it past full also generates heat since the energy that can no longer be absorbed by the cells turns to heat.

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Thank you for the explanation

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**monty_GTV** · November 5th, 2017 02:33 AM

i charge only when i get the low batt warning and i leave it charging overnight for the next day use. if its not up to the task then i might as well find a better equipped and capable phone

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**oj88** · November 5th, 2017 06:25 AM

Originally Posted by WallyWest

Heat.

When a lithium ion battery is at very low voltage, it draws a lot of current. Drawing lots of current produces heat.

Charging it past full also generates heat since the energy that can no longer be absorbed by the cells turns to heat.

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Charging circuits built into all phones prevent this. They stop charging when the battery becomes full. Not to mention the protection circuit that is built-into the cell itself.

You can verify this using a USB ammeter to see the current drop to near-zero (phone powered-on) or zero (phone off) when the batteries become full.

It’s no different from a laptop. You can indefinitely leave it plugged in even after the battery has been fully charged.

**dr. d** · November 5th, 2017 07:47 AM

the lithium battery bursts into flame, not because it is being used or being charged, but because it is defective.
in daily ordinary use, most of us have no battery issues.

**dr. d** · November 5th, 2017 08:07 AM

Originally Posted by StockEngine

who has time to prevent charging phones to 100%??? 🤣

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the pot-watcher!
besides, if i don't charge to 100%, the bars go down significantly faster, sometimes hovering over the danger zone in the most mis-opportune of times.

**LancerA174A** · November 5th, 2017 08:46 AM

Originally Posted by StockEngine

who has time to prevent charging phones to 100%??? 🤣

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Me! Well technically my phone itself limits the battery charge to 80-90% gamit yung built-in charging optimisation feature.

Pero since sa previous phone ko, basta 40% saksak na agad. Once a month lang sinasagad para mag reset yung battery meter.

Ilang years ko na din ako nag oovernight charging though most of the time iniiwasan ko talaga. Pag chineck ko naman yung battery health, lahat sila still in great condition with minimal battery wear.

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**oj88** · November 5th, 2017 09:17 AM

Overnight charging is a non-issue for any modern mobile phone or most LiIon-equipped gadgets of reasonable reputation.

There are exceptions though. I have a pair of Cobra 2-way radios that still use a manual charger. From empty, you need to set a reminder to stop the charger after 8-10 hours. Even though I've forgotten to remove the radios from the charging dock several times, sometimes for more than 48 hrs (batteries were a little warm to the touch), the radios still work. The batteries already have a very slight bloat on them but there doesn't seem to be any significant decrease in capacity, considering they're already 8 years old.

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