Nightstick 3.7V 1000mA Lithium Polymer Rechargeable Battery, White, 5554-BATT from OpticsPlanet, Inc at £34.89. Nightstick 3.7V 1000mA Lithium Polymer Rechargeable Battery, White, 5554-BATT. 7V 1000mA lithium polymer battery is a spare/replacement battery for the Nightstick XPR-5554G headlamp. Like