MIGHTY MAX BATTERY 8.4V 1600mAh Butterfly Replaces HK VFC Airsoft HK416 CQB Rifle MAX3456720 - The Home Depot
Mighty Max Battery Replaces cp0660 gp645 lcr6v4p hk-3fm4.5 wp4-6 Rechargeable Sealed Lead Acid 645 Backup Power Batteries in the Device Replacement Batteries department at Lowes.com