The NiCd (Nickel Cadmium) battery cells are the type that we have used since 1982. We buy the best No Memory high quality cells and build them into multi-deck power-houses. We are the only company who actually guarantees the flashes per charge and the only company with an extended pro-rate warranty.
The Medium NiCd Battery, BMED is the most popular sized Battery. It's not unusual for photographers to get two of these since you can switch them easily when one gets low. When we recommend a kit, it includes a Medium Battery.
If you use 200ws we guaranty 200 flashes per charge. If you use 25ws, that same battery gives you 1600 flashes. Likewise, if you use only 400ws, you should expect 100 or more flashes from this little battery.
The NiCd Batteries all have a 100 Month pro-rate warranty on the cells. For the Medium Battery, that warranty loses value at $2.50 per month for 100 months. In some cases, there may be a sale price that is a better value than the total pro-rate as you reach the end of the warranty. There is a small labor fee to install the cells and the new battery cells always start a new pro-rate warranty. The case and electronics have a Two Year warranty from when it's originally purchased.