[G2 General] avtemp:
Here is this guy,who replaced his battery with non-OEM battery from Amazon,i will underline the most interesting parts of his story.

Having trouble believing this is truly an OEM replacement for the original 3000mah battery

By Jon Strong on March 9, 2015

Verified Purchase

"Not sure what to think about this battery yet.

I've had the Verizon Wireless version of the LG G2 - model VS980 - since December 2013.

As of this review, the original battery in the phone is 15 months old.

It really should be close to new, but simply wasn't holding a charge well.

When the phone was new, I'd easily get 5 hours "screen on time" along with about 24 to 30 hours total battery life -- with less screen on time, the battery would last a couple of days.

15 months later, I'm lucky to get an hour of screen on time and 12 hours between charges.

I've never seen an original phone battery lose capacity that quickly before.

So...although the battery isn't designed to be user replaceable, that's never stopped me before.

I found a couple of videos on sites like iFixit and youtube of others replacing the battery, and found this battery (the one I'm reviewing here) on Amazon.

Ordered it, and installed last weekend - 9 days ago.

Unlike the battery in the new phone, which had about an 80% charge, this replacement battery was down to zero on arrival. I had to charge the phone for about 20 minutes (using the original OEM 2A charger and cable) before the battery reached 10% and the phone would boot.

Since then, I've fully charged and discharged the phone a couple of times, and have used it every day,

fully charging every night (as I did when the phone was new) -- keeping Lithium Ion batteries "topped up" is considered good practice (no member effect, etc.).

:DNO IT IS NOT!!!!

Anyway - unlike the battery in the original brand new phone, this one so far only seems to provide about 80 to 90 minutes screen on time, and I'm down to 15% battery after 12 hours.

It's conceivable that something in my Android configuration is off, or there's a battery-consuming rogue app, but I don't think so.

I'm an IT professional (more years experience than I care to think about!), and have been an Android phone hobbyist for several years - very familiar with unlocking, rooting, flashing, cleaning cache / Dalvik cache, etc.

I see no sign of rogue apps, I'd scrubbed cache, etc. Tried Greenify. All to no benefit.

I still cannot seem to coax more than 12 hours or so out of this new battery. This is making me suspicious that the battery may not, indeed, be up to original OEM spec.

3rd party clones often mimic the original product so closely that it's visually impossible to tell - but the difference in capacity seems pretty stark and really makes me wonder about the authenticity of this product.

I'm about to order from a different vendor on Amazon and try a different battery for comparison."

WELL,HE WAS WRONG.

Do not leave your phone to charge overnight,unless you want to kill your battery.

If you dont` believe me, watch Professor Jeff Dahn (Dalhousie University) at Youtube "Why do Li-ion Batteries die ? and how to improve the situation?"

youtube.com/watch?v=pxP0Cu00sZs

Watch his answers at 1:06:00 and 1:12:00.

Sorry,i`m not allowed to post direct links yet.