Lumedyne Minicycler rechargeable battery. (2 pages) These are the same batteries used in the Lumedyne modular flash system, coming with the same six year pro-rate warranty. Gel-type, no memory NiCd battery, no need to run them down before recharging. A full charge takes about 6 hours, less for partially run down battery. MiniCycler #052C: fast recycling, many flashes per charge, belt clip, has thermostatic switch to shut off the charge when complete to avoid overcharging, low battery warning at about 20% charge, optional Quick/Trickle Charger (#017) to shorten charge rate to 3 hours. Useable with Nikon SB24-35, Vivitar 283/285HV (1.3 second recycle time and 400 full power flashes per charge), Metz 45C series and Sunpak 500 series (2 sec recycle, 300 flashes) and Sunpak 611/622 (2.5 sec recycle, 200 flashes).... many more flashes per charge when using flash in automatic. Will accept Quantum Turbo cables.