Opticon OPN-2001 Compatible Battery 3.7V 190mAh

Opticon OPN-2001 Series — 3.7V Li-Polymer Replacement Battery

This 3.7V 190mAh Li-Polymer cell replaces the internal battery in the Opticon OPN-2001, OPN-2002, OPN-2004, and OPN-2006 compact barcode scanners. It fits the slim 26.10 x 20.40 x 5.50mm cavity in the OPN housing without modification. Capacity matches the original pack at 0.7Wh.

• OPN-2001 through OPN-2006 platform: These models share the same compact chassis, battery footprint, and connector pinout. The BMS handshake and voltage rail are identical across the series, so one cell covers all listed variants without any firmware or wiring difference.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the OPN platform and monitored BMS cutoff thresholds. The protection circuit responded correctly at both low-voltage cutoff and charge termination, with no false trips during simulated scan-burst inrush.
• First-shift preparation: After installing, seat the scanner in its cradle and run a full charge cycle before triggering any scans. The scan trigger draws peak inrush current at the start of each burst, and a cell that enters its first shift near minimum charge is more likely to hit BMS low-voltage cutoff mid-session.

Cradle showing charging error on a freshly installed pack

A new Li-Polymer cell shipped in a storage state typically sits between 3.6V and 3.8V. Some OPN cradles flag a charging fault when dock contact resistance is high enough to disrupt the charge handshake on the first insertion. Wipe the gold contacts on both the battery pack and the cradle dock with a dry cloth, then reseat the scanner firmly. If the error clears, the issue was contact resistance, not a fault in the cell itself.

Scanner drops wireless connection during rapid back-to-back scans

The OPN-2001 fires both the scan trigger and the wireless radio in close succession during fast scanning. When the cell voltage sags under that combined inrush load, the radio module can lose enough voltage headroom to drop its connection. This is more common with a degraded original battery but can also occur briefly with a new cell that has not completed its first full charge cycle. Charge to 4.2V before the first use, and the voltage sag under combined load will stay within the radio module's minimum operating threshold.