Smart Li-ion Four Channels Battery Charger and FOUR 3100mAh Panasonic 18650 Lithium-ion Batteries Charging Kit One of the best Charging kits available in USA - Smart Li-ion 18650 Four independent charging channels Charger, and Highest (Real) Capacity 18650 Batteries (3100mAh tested, and confirmed) NCR18650A This 4 bay Li-ion Charger is controlled by pre-programmed Microprocessor. It provides very safe and accurate Li-ion 18650 charging. Wide variety of safety features: Temperature (Over-heat) control, End of charge automatic cut-off, Four timers (auto power off if charging takes too long), Reverse Polarity Protection, Over voltage cut-off Batteries (Made in Japan) are the highest capacity Li-ion 18650 batteries available on the market - developed, and made by Panasonic- Top auto makers use these industrial batteries to provide power for their electric cars (eg. Tesla Motors)