Advanced NiMH battery technology, no battery memory effect.Easy operation, battery can be charged anytime without the need to fully discharge.Best if stored in temperature 35-70 Degree and keep away from sun light or heat.For use in ERA004, ERICS13, EROA002, EROA003, SDGE0507R2, SDGE0501R2 AEG.6 months warranty.Technical SpecificationsVoltage10.8VBatteries9 NiMH AA matched cells Capacity2000mAhConnector Type:Mini Tamiya Female. DimensionsEach pack measures approximate (L x W x H)4in x 1.125in x 0.56in. Single cell measures 2in(L) x 0.56in (diameter)Weight:0.55 lb