Tracker: If you check with WalMart in the electronics section, they carry rechargeable batteries manufactured by Pure Energy. In Canada a package of two costs $10.97 plus tax. They also carry the charger which will recharge four batteries at once. AAA, AA, C and D batteries can be recharged in this charger. There is also a port for recharging nine volt batteries. I haven't seen any 9 volt rechargeable batteries, but the option is there. The batteries and charger are white in color. Batteries are manufactured in Canada, while the charger is manufactured in China. The charger runs around $28.00 plus tax in Canada. If you purchase those batteries, make sure to keep the original package and receipt incase of warranty claims.