Need a replacement battery for your emergency lights? Check out the Dantona CUSTOM-318 Rechargeable Replacement Battery! This replacement 3.6 -volt, 1, 000 mAh Nickel Cadmium (NiCd) battery is used in many applications and meets or exceeds original manufacturer specifications.. 3.6 volts, 1, 000 mAh. Long-lasting. Rechargeable