nokia 2100 battery discharging problem
 

it runs down immediatey u are taking a call or making a call any solution

check!!!
 

check ur phone battery supply if slightly shorted.. test point use multitester use ohms 1x... + to + and - to - output has a continuity... then + to - and
- to +... output: if there a continuity only means phone is shorted and
if it has no continuity it only means it is not shorted. then u have to replaced your battery...

here a tip if ur battery is weak...
if your battery indicates low batt.. just charge your battery 3hrs straight.. then after 3hrs unplugged it then use it for call and txt.. if ur battery last for 1 to 2 days your battery still ok.. but doesn't last for a day.. u have to replaced ur battery... :)

change the PF "pfo103"

i think its pf too better known as power amp