NI-MH battery size : AA voltage : 1.2v capacity : 1500mah Pls advice your own request . Specification details : NI-MH battery voltage:1.2V capacity : 1500MAHSize (without packing ):aa ,Height: 49mm ,Diameter :14.1mm , weight:25g Representative High Power battery ,Suitable for Higher rate discharge characteristicsWe can do any size you require