I am a little cautious with the NIMH batteries, first time messing with them. I got the new batterys yesterday, changed the connectors and charged one set on .9 amps for the first cycle. I discharged them using my light bar set up. Got 10 1/2 min out of the batterys and this was the first cylcle. The pack seemed to hold full power right to the end, so first impression the cells are matched pretty good. The pack only got mildly warm during discharge, which was a very good sign. I get 4 1/2 min with my dischage lights, out of the 1500 NiCD packs, 10 1/2 was real good on the first cycle for the new packs. I think I will cycle the new packs onece more then give them a try in the boat. The Tenergy 4500 mha 7 cell packs look real good to me so far, 14 guage wire.. Would have liked to see 12 but 14 will be fine.