Sony 2000mah AA 4nos Ni-Mh Rechargable battery with USB Charger BCG34HHU4K 1)Usable worldwide: Charge AA or AAA batteries directly from various USB ports, including USB AC adaptors, PCs, or Power Bank. 2) Charge multiple batteries simultaneously, two or four at a time. 3)Safety features include auto charge cut-off, safety timer and non-rechargeable battery detection. 4)Ideal for multi-use devices: mice, remote controllers, clocks, radios, flash lights, IC recorders, toys, cameras.