I have 5 flight packs (10 batteries) I purchased a couple of months ago. I broke them in with 6 easy cycles on the batteries,..ran them down to 50% at about 1/4 throttle. I am having very good luck with them overall. The first three cycles the Ohm's were a bit high at around 3.9 to 4.2 on average and about the 4th-6 cycles the ohm's started to come down. I am using the Cellpro and charge on accurate charge at 4.0 Amps. The average ohm's are around 2.4 to 1.9 per pack. These packs are sensative to how you break them in. I have one pack I abused right out of the box and one battery pack will only carry 16 volts (it's shot with one flight) and the other is fine in the 10S configuration. I wanted to see how hard I could abuse one right out of the box,..$42.00 down the drain. But I did get my answer,...

I bought them as practice packs, because 35C- 5100 are out of stock and I can't afford the ThunderPower 5000/5400's at $160/ $189.00 per pack. When I do purchase the 35C- 5100 when they are back in stock, they will be for the NATS. The Zippy Compact 25c 5000 seem to be doing really well with 20 plus flights currently.

I know this does not help your problem, but it might help in the future or maybe not? Try calling the U.S. warehouse and see if they will help you. I know they do not have any in stock and the only warehouse that does is Australia. I looked a few days ago to replace my bad one, but heck $43.00 bucks, I'll keep rolling the dice. I'd rather support a U.S. Provider like F3A Unlimited, Advantage Hobby or Aero-Models, but- it- is- what- it- is,.......

Bill