Samsung Galaxy S2 | Battery issues.

My old Galaxy S2 is drainig battery so fast!
Battery indicator shows 10%, but suddenly it shuts down, and after reboot shows 1%
Replaced battery, same thing.

Mine did and does that but i didn't bother replacing as the screen was knackered also so just got another phone.

Maybe it may need calibrating?

Motherboard fault, S2 is old now so this fault is generally considered as beyond economic repair.

I'm still running one of these as mu "spare phone"
cracked screen
wifi longer works
battery life is pants
pitiful operating speed
Hoping the other half has got me a new phone for xmas, so I can finally retire the antique and turn the SG4 into my "spare phone"

mine was the same, drained battery, had to scrap it and get something a bit more worthwhile

Must admit, the S2 is one phone that has held up well for a long time.

Been using S2 for 4 years now and only needed 1 aftermarket battery in that time. Buy Anker as a very reliable brand.

I used to get battery issues but found it was down to dodgy App updates. I set App upgrades to notify first, so I knew which were the last Apps to have been updated. Also, I read the update notes now and only update the App if there are any worth wile updates. Then rolled back the app if it gave problems.

Had the same problem here , tried different things , at the end i found a link wich told me to clear the cache and that solved the problem.