OptiMATE cable O-17. Convert your older TecMate charger or British chargers to connect to the OptiMATE permanent battery cable (or other SAE battery cable). The 2-pin KET / TM / british connector is converted to an industry standard SAE 2-pin connector. Features Length: 15 cm Max. cable load: 5 A Use at very low temperatures: down to -40 ° C High quality cable developed by TecMate