Features: Supports up to four packs of the same type, same cells 3-4S battery pack. It consumes only 1/4 of the time when charging four batteries separately consumes, so it can save the total charging time. Contains the battery voltage display function. Balanced port output line with 14AWG multi-strand silicone line. Equipped with safety protection XT60 plug silicone cap. Equipped with 30A fuse between any two groups of batteries, to prevent line from being burned due to the large batterypressure. This product is used for simultaneously charging multiple batteries (including LiPo, LiFe, and Li-ion types) in parallel.