Hello, I am using Orange LiPo battery (6S 16000mAh 25C) and using iMax B6 mini balance charger to charge this battery. I am using 12V 2A DC adapter to power on balance charger. What value should I set for Charge rate to safely charge the battery?
I think you’re going to need a bigger charger 
6S means ~24V.
12V x 2A is 24W maximum.
So you can supply 1A at 24V.
If your battery is fully discharged, it’s going to take you 16 hours to
charge it with that charger.
Okay Thank You. can you suggest any bigger charger which is available in India?