Hitech - 12 AAA Rechargeable Batteries and Charger Set For GeoTrax Working Town Train Railway Package includes LCD charger, adaptor, car adaptor, 12 AAA Ni-Mh 850mAh rechargeable batteries Charger comes with delta V control, safety timer & discharge function Charges 1-4 units of AA/AAA Ni-Mh/Ni-Cd batteries. Charges 700mAh AAA batteries in 2 hours. LCD screen displays charging status of each battery cell Trickle charges upon completion of charge. Car adaptor included for charging batteries in car