I just bought a 9.6v 1000mAh battery (8 batteries) with a Multiplex 810 WWC charger. I had to change the connector on the charger to a female Tamiya connector but wasnt 100% sure which was + and -. The wires were like a co-ax type so i connected the white internal wire to the round female side of the connector and the outer wire to the square side of the connector. I checked with a multimeter and it seemed ok. The lights on the charger appear to indicate charging and there are no error lights but even after 7-8 hours the battery only gets to about 1v which it promptly loses. Any ideas appreciated as i dont know where the problem lies so not sure which item to get a refund on! Cheers