Opticon H21 Barcode Scanner Compatible Battery 3.7V 3060mAh

Opticon H21 / H22 Series — 3.7V Li-Polymer Replacement Battery (BTR0600)

This 3.7V, 3060mAh Li-Polymer battery replaces the original pack in the Opticon H21 and H22 mobile barcode scanners. It fits the H21 1D, H21 1D Alpha, and the extended H21/H22 family using OEM references BTR0600, 02-BATLION-21, LBP-02, and 2ICP48/65/11-2. Same cell dimensions — 64.38 × 48.96 × 10.42mm — as the factory pack.

• H21 and H22 family fit: Both series share the same 3.7V single-cell architecture, connector pinout, and BMS handshake protocol — which is why one pack covers the full lineup. Swapping between 1D and alpha variants requires no firmware or hardware changes.
• Bench tested on actual hardware: We cycled this pack through repeated scan-trigger and wireless polling loads on the H21 platform. The BMS held charge cut-in at the correct threshold and did not trip on simulated burst scanning sequences.
• First-shift pre-charge for scan trigger inrush: After installing the pack, seat the scanner in its cradle and run a full charge cycle before deploying it on a pick-and-pack shift. The scan trigger draws its highest inrush current when the cell voltage is near its floor — a fully charged cell prevents a false BMS protection trip on the opening scans of the first shift.

Cradle showing a charging error on a new pack

Charging docks on the H21 series read pack state through the contact pins on the battery base. Contamination or oxidation on those contacts raises resistance enough for the dock controller to flag a fault rather than begin a charge cycle. Remove the pack, wipe the gold contacts on both the battery and the dock bay with a dry lint-free cloth, then reseat firmly. If the error clears, the dock is reading the pack correctly and charging will proceed normally.

Scanner dropping its wireless connection during rapid scan bursts

The H21 runs its imager and its wireless radio simultaneously during active scanning. A rapid burst of scans pulls combined inrush from both subsystems at once — if the cell voltage sags under that combined load, the radio can lose enough power to drop its connection mid-session. This is more common when the battery is below 20% charge. Keep the pack above that threshold during high-frequency scanning shifts, and check that cell voltage at rest reads at least 3.6V before a demanding session begins.