The Leica GKL32 is primarily designed to charge the external battery GEB171 and all other batteries with 5-pole sockets. It allows charging of one battery at a time.
The following batteries can be charged:
GEB171 (7-9 hours charging time)
The following batteries in 2-8 hours:
GEB68
GEB70
GEB77
GEB79
GEB87
GEB187