salam,
i am a ups mechanic, and currently i come across a ups which do not charge the battery. it gives output but do not charge the battery. so i want to ask that what would be the fault that i should mend. or simply tell me which tiny electrical component is to be repaired or changed.\\
if you have an idea about this then kindly reply
or
if you can, then send sms on my number i will call you later on, my number is 03005866772