This is the PA-44B which replaces the NC-88B. This charger is intended for use with several cradle's including the VXA-220 Pro VI.

NC-72B 110 Volt, 12 Hour Charger
for VXA-150, 700, 710
P/N 11-05864

NC-72C 220 Volt, 12 Hour Charger
for VXA-300
P/N 11-05865