Bundle includes T9688 smart charger and 4 rechargeable Premium C size batteries Rechargeable batteries c size offers 5000mAh capacity Rechargeble up to 1000 times offering long lasting c size batteries performance T9688 smart charger is compatible with wide range of NiMH/NiCd battery sizes AA/AAA/C/D/9V Both size c batteries and charger include a 12-month warranty. Tenergy's Premium rechargeable C batteries and T9688 LCD Smart Battery Charger is the ideal bundle for electronics that are powered by C size batteries. The Premium rechargeable batteries offer long lasting power packed in a reliable C size batteries.