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MadMax · March 18th, 2006, 00:13

I'm running twin parallal Kokam 11.1v 3Ah (1.5Ah ea) packs in my P90. Absurd ROF.

These cells are marketed to the RC car and airplane market so they're designed for high current application. So far I'm very happy with them, but I haven't made a self protection cct yet. I have to be careful not to run them down completely (no cutoff circuit) but that's not a huge deal with 3Ah of capacity and my use of locaps (P90 hicaps suck).

You also need a proper charger for Lion cells.

The Kokam cell has made a big difference in my battery collection. I see myself using only NiCd (cold weather battery) and Lion now. I've never liked the NiMH internal resistance issues of NiMH and they perform very poorly in the cold so I use Lion in the warm weather for it's very high energy density and NiCd for the cold weather performance. At 3Ah, there's no need for me to fast charge. I'm happy with slow charging the night before. They're rated for 8C discharge which means that individually each can supply 12A for a total of 24A in the parallel arrangement.

Did you know NiCd cells are still launched in sattelites? They're robust and can provide power on the cold dark side of the earth.

Check: towerhobbies.com for Kokam cells. they're not that expensive.

March 18th, 2006, 00:13	#5
MadMax Delierious Designer of Dastardly Detonations Trader rating Join Date: Dec 2001 Location: in the dark recesses of some metal chip filled machine shop	I'm running twin parallal Kokam 11.1v 3Ah (1.5Ah ea) packs in my P90. Absurd ROF. These cells are marketed to the RC car and airplane market so they're designed for high current application. So far I'm very happy with them, but I haven't made a self protection cct yet. I have to be careful not to run them down completely (no cutoff circuit) but that's not a huge deal with 3Ah of capacity and my use of locaps (P90 hicaps suck). You also need a proper charger for Lion cells. The Kokam cell has made a big difference in my battery collection. I see myself using only NiCd (cold weather battery) and Lion now. I've never liked the NiMH internal resistance issues of NiMH and they perform very poorly in the cold so I use Lion in the warm weather for it's very high energy density and NiCd for the cold weather performance. At 3Ah, there's no need for me to fast charge. I'm happy with slow charging the night before. They're rated for 8C discharge which means that individually each can supply 12A for a total of 24A in the parallel arrangement. Did you know NiCd cells are still launched in sattelites? They're robust and can provide power on the cold dark side of the earth. Check: towerhobbies.com for Kokam cells. they're not that expensive. __________________ Want nearly free GBB gas?