I agree with Dan (who introduced me to these batteries) about the A-123, 4S2P nanophosphate batteries.? They are lightweight, hold a charge forever, charge fast and I had no problem in KH6 using my IC-7000 on SSB running 50w routine and then peaking to full 100W PEP when needed.? I also bought them from Buddipole but found the Cellpro charger on Ebay.