Battery capacities(charging): 5-40Ah. Battery capacities(maintenance): 5-60Ah. Battery technologies: AGM, GEL, VRLA, SLA, WET ,EFB lead batteries And LITHIUM(LiFePO4). Bad battery detection Yes. Suit for all kinds of 6V,12V lead acid batteries and 14.4V LITHIUM(LiFePO4) batteries.