G3 Battery - 100% lasts longer than expected

[Joltcola1234]

This seems like normal behavior for my G3. The standby time is ridiculous on this phone, I take it off charge in the morning at about 6:00am and most days by 12:00pm it's still at 100% (with very little use). My battery drains steadily once below 100% and in use, but even then I like the battery on the G3. I've had plenty of days in the first month or so where I've gone 48 hours without charging.

 

[durandetto]

The g2 was the exact same way. 100% lasts a long time especially at idle.

Sent from my LGLS990 using Tapatalk

 

[AndroidHabit]

That percentage is really just a mapped value. Your phone's power management system monitors the voltage of the battery and reports that value back to the operating system. Internally, it then refers to a table that maps the voltage to a number value, which is then displayed. It isn't that your phone's charge is somehow miraculously staying at 100% for a long time, its just that the voltage reported is above the 100% threshold.... and it remains at 100% until the voltage hits the value mapped to 99%.

Maybe it's a little bit of a psychological trick... battery obsessed people often get aggravated when their phones drop to 99% so quickly after charging full, so maybe they just played around with the mappings (which I suspect are somehow different when charging and discharging by the way) so that it 'hold's at 100% for a bit before dropping at a more normal rate.

What he said, try leaving you phone charging over night and when you take it off in the morning watch how long it stays at 100% the higher the voltage the battery has the longer it will last. Just charging it to full and removing it will not charge it completely and it will lose charge faster than if you left it over night.

 

[Stwutter]

What he said, try leaving you phone charging over night and when you take it off in the morning watch how long it stays at 100% the higher the voltage the battery has the longer it will last. Just charging it to full and removing it will not charge it completely and it will lose charge faster than if you left it over night.

Yeah, that seems spot on. I took the phone off charge at work yesterday right when it buzzed to tell me it was 100%. It started losing battery steadily with normal use. This morning, having been charged overnight, it took nearly an hour of use to drop to 99%.

As I've alluded to above, it's all good, but I'm not sure why 100% can't just mean 100%. Effectively, if you take the phone off charge as soon as it hits 100%, you're missing out on a few percentage points of battery.

Posted via the Android Central App

 

[Punyawee Werasopon]

for me too... 100% will last for several hours after disconnected from the charger. but 30% to empty will reduce much quicker.

by the way, after I changeto ART runtime and disable the Fast dormancy function. The battery life is much better lasting. I can finish my day at 30% for general use..

waiting for android L. I hope G3 will be the perfect phone at that day

 

[LeoRex]

for me too... 100% will last for several hours after disconnected from the charger. but 30% to empty will reduce much quicker.

LiPos don't discharge linearly.... They drop in a sort of S-curve.... quicker at first, level off a bit during the 'sweet spot', then drop off at a faster rate at some point. Phones have different power demands than, say, a flashlight, so I'm not sure where a) the 0% voltage value is and b) the discharge characteristics of the particular battery in the G3.... but it's not like the phone draws power at a constant rate, and batteries perform differently based on the amount of power being drawn... there's a lot of variables at play.

When the G3's 3000 mah battery is 'dead', there's probably a fair amount of charge remaining on the thing. But while the voltage that the battery provides is constantly changing, the voltage that the phone needs does not... so the power management has to step up/down the voltage to provide a constant value.... At some point, the phone can't maintain the voltage, so the phone would have to cut out before then. That this point is also probably a fair amount higher than the point where depleting the battery could cause some damage to the cell (LiPos don't like to be completely discharged).

Now.... battery makers play a little funny math with the rating.... the battery is rated at 3000 mah, now, that doesn't mean that your G3 uses all of the charge before it reaches 0%, in reality, the usable charge is some amount less than that. That 3000mah lists how much charge that battery can provide until it reaches some voltage cut-off set by the battery manufacturer.... typically FAR lower than anyone would drain it to.

 

[AndroidHabit]

This is the first I heard of this Fast dormancy function.
I looked into it and it seems a little tricky to do, how easy was it for you to do?
Is there an easier way to do this?

UPDATE: Never mind I found it in settings.

 

[Nunya Biz1]

I've been wondering about my battery too-in the a.m. the 100% will stay put even while usage. But later in the day the "meter" seems to run a bit faster. I end up charging it whenever I can to avoid the paranoia...but I've never got two days use without a charge as someone reported.