Fast charging Issues help please


Oct 30, 2020
Can SOmeone help please, I have poco f2 pro with k30 pro rom installed by
Before 12.5 enhaced edition update,my cellphone used to fully charge within 70 minutes and ampere application showing charge of 4700mah while charging
After update,charging speed doesnt exceed 3000mah
My another friend with Poco f2 pro cellphone without rom,after he received that same update,his charging speed also doesnt exceed to 3000mah,before it was 4700 mah too
Can someone tell me the problem here?
Thank You