This Ni-MH AA 1.2V 1000mAh Rechargeable Cell Battery is very commonly used product. Its specifications are here.

Specification:

1) Type: AA
2) Capacity: 1000mAh 
3) Voltage: 1.2V 
4) High energy density

5) Low self-discharge 
6) Chargeable up to 500 or 1000 times 
7) Low internal resistance 
8) Widely applied in mobile communication, digital products, electric tools, lightening devices, toys,

Application:

1. Others: Massager, electric toothbrush, electric shaver
2. Modality equipment: Mobile DVD, MD, CD, digital radio
3. Decorative lighting: Solar lamps, torch, emergency light
4. Electronic toy: Electrocar, model airplane, remote control
5. Electric tool: Electric drill, electric screw, and electric saw
6. Communication equipment: Cordless telephone, interphone and VOIP

7. Solar lamps, torch, emergency light, search light, cordless phones, transceivers , cellular phones and fax machines, electric shavers, electric toothbrushes, massagers and portable vacuum cleaners, emergency power of machinery
Package include:
1x AAcell 1.2v rechargeable