Tecmate OptiMATE CABLE O-17, Adapter, charger lead Convert your older TecMate charger or British charger brand to connect to the OptiMATE (or other SAE) permanent battery lead! Model O-17 specs: L= 6/15cm; 18AWG cable -40C/-40F very low temperature use. Cable max. rating: 5 Amp. KET/TM/british 2 pin connector converts to an industry standard SAE 2-pin connector.