Uhm this post needs a bit more clarification, as the Buzz has built in protection, what Batts, and pics of the Mod maybe ,, and could you elaborate a little more then this please ?
Yes, exact details would be much appreciated. I'd like very much to know:
Exact make and model of the batteries
and EBay item number
Best guess as to how many charge/discharge cycles
Had they always been kept together as a pair
Had either one ever drained below 3 volts for whatever reason (causes permanent damage to LI batteries)
Did they always come off the charger at nearly equal voltage (if mine are off by as little as .2 volts, I ditch them)
Were they ever dropped hard that you know of? Drop it, ditch it.
Did you ever notice any "suspicious activity" when charging the batteries?
Check out this picture; the battery on the left [marked with "XX"], that is not taking a charge, measures about 4.01 volts. The one on the right, that is taking a charge, measured about 4.22 volts before it went on the charger. That is suspicious.
Just took them off the charger after both lights went green (after about 3 minutes). Battery "XX" still measures 4.01v, other battery is at 4.23V. Even more suspicious. Into the recycle bin with both of them.