The BMHS Battery provides 150 flashes at 200ws with a Four Year pro-rate warranty. It uses a single deck of NiMh battery cells and is about 1.5 inches tall and weighs just over a pound and a half.
The BSML Battery provides 100 flashes at 200ws with a 48 month pro-rate warranty. It uses a single deck of NiCd battery cells and is about 1.5 inches tall and weighs just under a pound and a half.