My choice for battery three years ago was the Bioenno BLF-1250AS, LiFePO4 (Lithium-Iron). Yeah expensive, but:
- Inherent thermal and chemical stablility, so no runaway like LiIon
- 50AH vs C&D's 30AH (yeah it's an inch deeper - had to make a new strap)
- Provides 2500 - 7000 cycles & a 10 year...