Panasonic N600AAK Non-standard battery (rechargeable) AA High temperature resistant NiCd 1.2 V 600 mAh | Conrad.com
Amazon.com: 4-Pieces Size 1.2V AA(300/600/800mAh) Or AAA (600mAh/800mAh) and Ni-Cd/Ni-MH Rechargeable Battery for Solar Light and Solar Devices (1.2V AA 600mAh Ni-Cd) : Health & Household