Dynacore D-4BMC 4-Channel 100W B-Mount Battery Charger

The D-4BMC charges four B-mount batteries at once, and it does not share a supply between them: each of the four bays gets its own 33.6 V, 3 A output, so a full rack of batteries comes back at the same rate as a single one. That is the difference between a charger that keeps a two-camera B-mount kit turning around overnight and one that becomes the bottleneck.

It runs on any mains supply from 100 to 240 V, 50 or 60 Hz, so the same unit travels between regions without an adaptor. At 3.28 kg and 256 x 132 x 215 mm it sits on a cart or a bench rather than in a camera bag, which is the right trade for a four-bay unit that is meant to stay with the charging station.