On Wednesday, September 26, 2012 8:29:19 PM UTC-7, JS wrote:
TA posted about LiFePO4 batteries a while ago.

Using the Tenergy 10AH batteries, I'm impressed. Lighter, longer lasting.

6 hours of ClearNav, 302, 6201 and TT21 brings two 10AH batteries "down" to 13.1V. The old SLA and AGM stuff I'd been using now seems rubbish.

The Lithium Phosphate batteries even use your existing chargers.

Jim

Just anecdotal... one of my RC flying buddies wanted high capacity in an un-finicky rechargeable battery, so he chose LiFeP04. He uses them in an RC plan that draws in excess of 40 amps at full throttle. He has over 600 cyles on the battery pack so far. His charging system is a piece of lamp cord cut to a length that delivers his desired charge current. His source: battery packs for cordless power tools. His thinking was that if it can handle the current draw of a 10" circular saw, it could handle his RC plane.