Nitecore D4 Digicharge universal home/in-car battery charger, Four Olight 18650 3400mAH rechargeable batteries with 2 X EdisonBright AA to D type battery spacer/converters Compatible with Li-ion (26650, 22650, 18650, 17670, 18490, 17500, 18350, 16340(RCR123), 14500, 10440), Ni-MH and Ni-Cd (AA, AAA, AAAA, C) rechargeable batteries Capable of charging 4 batteries simultaneously; Each of the four battery slots monitors and charges independently Integrated LCD panel clearly displays charging parameters and progress Features over-charge prevention to protect batteries This bundle includes Four Olight 18650 3400mAH rechargeable batteries with 2 X EdisonBright AA to D type battery spacer/converters