Experience with Batteryspace LiFePO4 "water bottle" battery?
I'm looking at the 12.8V 6.6 AH LiFePO4 battery in a water bottle. Anyone have experience with it? How well-made are the connections, cables? Is there a better charger than the one they sell? How quickly does the peak voltage drop off? (15.6V sounds high - at 3.8V max/cell = 15.2 for a 4S2P battery, and the cell spec sheet says 3.65V/cell = 14.6V max.
My application is a little different - powering a 30W VHF RF amplifier for a bike-mobile ham radio station. The water bottle packaging is ideal for my road bike (water-protected, no rack, seat post rack, or panniers) and the weight is a big improvement vs. SLA. I am concerned about the peak voltage - >15V is above the amplifier's ratings.
Also considering their much cheaper 12V NiMH battery also in a bike water bottle No over-voltage issues, and I have a charger, but not as much capacity and the max current (polyfuse) is close to what the amp will draw if I forget and drive it at full power.
Comments on experience with batteryspace, their LiFePO4 pack and charger in particular are appreciated. I've also considered building my own pack; after buying the cells, heat shrink, and charge control board and stuffing it into my own bottle (or other packaging), I think I'm better off buying it assembled from them.