Makita stick 9.6v battery convert to 10.8v adapter

Convert all old makita 9.6v stick battery to new lithuim ion battery makita BL1013, buy the industrial 24mm rubber O-ring to secure tool and adapter,use 0.8mm copper for battery terminal do not use other metal cause will melt the battery cover and don put Makita old tool into the store,they are best cordless in the world