Spare 1128 UHF Reader Compatible Battery 3.7V 1800mAh Li-ion

Spare 1128 UHF Reader / 1153 — 3.7V Li-ion Replacement Battery

This 3.7V 1800mAh Li-ion cell replaces the original battery in the Spare 1128 UHF Reader and 1153 handheld scanner. Both devices use the same voltage rail and battery form factor, making this a direct swap. Dimensions are 64.94 × 36.80 × 11.80mm — confirm against your existing pack before ordering.

• 1128 UHF Reader and 1153 compatibility: Both models share the same 3.7V single-cell architecture and battery compartment envelope. The connector pinout and BMS communication protocol match across the pair, so one pack covers either unit.
• Bench tested on actual hardware: We cycled this pack through simulated scan-burst and wireless polling loads. The BMS held voltage within spec across repeated trigger events and did not trip under combined radio and imager draw.
• First-shift prep for pick-and-pack environments: After installing, seat the scanner in its cradle and run a full charge cycle before the shift starts. Scan trigger inrush is highest when the cell is near minimum — a fully charged pack prevents false BMS trips during the first wave of rapid scanning.

Cradle charging error on a freshly installed pack

A new pack sitting in a dock can trigger a charging error if the gold contact pads on the battery face have oxidation or handling residue. The dock reads contact resistance as a fault and stops the charge cycle before it begins. Wipe both the pack contacts and the dock pins with a dry lint-free cloth, then reseat firmly. If the error clears, run the first charge to full before pulling the scanner for use.

Scanner dropping wireless connection during rapid scan bursts

During a fast scan burst, the imager and wireless radio draw current simultaneously. If the cell voltage sags under combined load, the radio module can drop its link to the access point before the BMS trips the pack. This looks like a connectivity fault but is actually a voltage sag event. A fully charged cell at 4.1–4.2V handles the combined inrush without the sag — check that the pack reached full charge before starting a high-volume scanning session.