12V/7Ah LCE power source w/ 4-pin XLR connector. Includes BC3351 charger. Cool-Lux SmartPower belts and packs use high-quality, high-reliability Lead-Calcium Electrolyte (LCE) cells that cost much less than NiCd cells, and are much more forgiving. Cool-Lux SmartPower Belts and Packs use high-quality, high-reliability Lead-Calcium Electrolyte (LCE) cells that cost much less than NiCd cells, and are much more forgiving. They’ll hold up to poor charging habits, deep-discharge operations, and can be stored with minimal maintenance. They’re leakproof, recover to a full charge, and they will never suffer from memory loss. SmartPower Belts and Packs are virtually indestructible, and constructed with rugged, lightweight 1,000-denier nylon. Each is precisely cut and stitched with durable, condensed, heavy-duty thread to assure a smooth, tight surface with the cells firmly encased. Soft, high-density foam padding provides comfort while shooting.