The BLSM is a type of Lithium battery. It has a battery gauge right on the front of the battery. These charge up the fastest, hold their charge the best, last for the most charge cycles, have the longest pro-rate warranty and have the most flashes per pound of any of our battery options.
You must use the CL3U LiFePo4 Charger but it will be finished charging up in less than an hour and a half. At 200ws this Battery provides 250 flashes per charge.
BLSM Small LiFePo4 Battery is a safe style of Lithium chemistry that will not explode and is very lightweight with a lot of flashes per charge and over 2000 charge cycles.