I have a Lg prada, and it only lasts about 4 hours on a charge sometimes even when Im not using it. It’s a standard 800 mah battery. What battery can I use to double the battery life? Thanks for any input!

well i dont know about what battery to use but my phone used to do that too .. (not the same phone)
my battery wore out so quickly because the brightness was ALL the way up - and the duration was "always on" or 3O seconds.

i turned the brightness down by 2/3 bars,
and changed the duration to 7 seconds, and it lasts for a day or two !
WITHOUT charging !!

TRY this ! it will work (: