With the B4B NP-C2 2-channel Li-ion Battery Charger / AC Adaptor,  Two batteries can be charged simultaneously
The AC Adaptor can power a camera when batteries are being charged  Works with Lithium chemistry NP-1 mount batteries

Input AC : 90~240 VAC, 47~63 Hz
Full Charge : 60-65 WH - 270 min
Output DC Power (XLR4) : 15 V 4.5 A
Size :9"W x 6"D x 3.5"H
Weight :4.5 lbs

(batteries not included)