how much battery backup do you get?

[valkaizer2594]

i recently switched from moto g3 to i9500 and surprisingly im getting only 2hrs of sot with normal/light usage no gaming at all. even on standby battery trains quickly. i tried ale95 rom then first flight now im using RR and here is not change. is it normal or is my battery doomed? it is a fairly old battery so im wondering if this is normal or should i buy a new one

 

[Rhoban]

New one.

Although, S4 batteries aren't made anymore, so I guess any stock you find is old one, but make sure it is actually genuine.