What you will need: A Phillips screw driver (2) AA rechargeable batteries with NiMH Instructions: Loosen screw with a screw driver. Remove battery door. Remove and replace batteries. Warning: Installing the batteries incorrectly may damage the scanner. Attach battery door and tighten screw. Battery life may vary with vibrate settings and work environment. Replace within 2 years. Important: Only charge NiMH rechargeable batteries. Charging alkaline or other battery types will damage the scanner.
Recommended: Use the same 2000 mAh batteries (brand name not necessary). Note that using lower capacity may not meet its advertised specifications.