Suddenly, my bv8000 pro became very slow to charge and disharge very fast.

nothing has chaged : same rom (0.1_20170803), same charger, same cable.

6/7 hours to complete charge, 12 hours max before complete discharge.

very disapointed...my phone is only 14 months old...

I highly suggest to perform a factory reset and report back. I don't think the battery has degraded so much is so small time.

thank you admin but i won't perform a factory reset
each time i did it before nothing has changed and i have lost all my personal data
i will do it when you will release a good oreo rom...