Wasp DR4 2D Compatible Battery 3.7V 3000mAh Li-Polymer

Wasp DR4 2D / DR3 2D — 3.7V Li-Polymer Replacement Battery (633809002175)

This 3.7V, 3000mAh Li-Polymer battery replaces the original pack in the Wasp DR4 2D and DR3 2D barcode scanners. Both are handheld data collection devices used in retail, warehouse, and inventory environments. Capacity figure is sourced from the product data — 11.1Wh total energy.

• DR4 2D and DR3 2D compatibility: Both models share the same 3.7V cell platform, connector pinout, and BMS handshake protocol — that is why one pack fits both. The voltage rail and charge termination logic are identical across the two scanners.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on the DR4 2D platform and confirmed the BMS negotiated cleanly with the host device. Charge termination triggered correctly at full voltage with no error flags from the scanner firmware.
• First-shift charge protocol: After installing, seat the scanner in its cradle for a full charge cycle before running pick-and-pack. Scan trigger inrush current is highest when the cell is near minimum — a fully charged pack prevents false BMS trips on the first shift of use.

Cradle showing a charging error on a new pack

A charging error on a freshly installed Li-Polymer pack almost always traces to contact resistance at the dock, not a fault with the battery itself. Oxidation or debris on the cradle's charge contacts interrupts the current path, and the dock flags this as a pack error. Wipe the gold contacts on both the scanner and the cradle with a dry cloth, then reseat the scanner firmly. If the error clears within 30 seconds of reseating, the contact surface was the cause — not the cell.

Scanner loses wireless connection during rapid scan bursts

During rapid back-to-back scans, the scanner draws simultaneously from the imager and the wireless radio — two inrush loads hitting the cell at once. If the pack voltage sags below the radio's minimum operating threshold during that combined draw, the wireless module drops its connection before the scan completes. This happens most often when the cell is below 30% charge. Keep the pack above half charge during high-frequency scan shifts, and check that the battery reports at least 3.5V at rest before starting a picking run.