battery drains too fast

[mrivev]

Hi
I have a problem with the battery of my HP Prime, a charge usually used to last about 2 weeks sometimes even more however suddenly it just last less than a day. I read other posts saying its a firmware issue so I downgrade from 10637 to 8151 and to 5547 without any positive result. Does any body had the same problem?, is there any solution?
If there is a battery issue I found out that a Galaxy S3 battery could replace the original one is it true does any body try it before?
(https://www.omnimaga.org/news/put-a-sams...-hp-prime/)
Thanks in advance.