Batteries and Accessoires for Panasonic AG-40U Camcorders : 

Camcorder Battery for Panasonic : AG-40U
by Voltage 9.6 Part Code: BCD1131 Chemistry: NiMH Voltage: 9.6 Original Amp: 1.3 (1300 mAh) AmpHours: 2.1 (2100 mAh) Color: Black Size: 4.38 x 2.63 x 1.13 Warranty: 12 MONTHS More info Rectangular shape with button two contacts on side. Our incredible low price: $38.96 Part Code: BCD1131 In stock, usually ships the same day