CipherLab CP55 Barcode Scanner Replacement Battery BA-0053A3

CipherLab CP55 / CP50 — 3.7V Li-ion Replacement Battery (BA-0053A3)

This is a 3.7V, 3300mAh Li-ion replacement battery for the CipherLab CP55 and CP50 handheld mobile computers. It carries the OEM part number BA-0053A3 and fits the original battery bay without modification. These scanners are common in warehouse pick-and-pack, retail stockroom, and logistics environments where shift-long uptime matters.

• CP55 and CP50 compatibility: Both models share the same battery bay dimensions, connector pinout, and BMS handshake protocol — the CP50 and CP55 use an identical battery management interface, so one pack covers both platforms without any firmware or connector conflict.
• Bench tested on actual hardware: We ran this pack through charge and discharge cycles on CP55 hardware. The BMS accepted the cell chemistry without fault codes, held voltage above 3.5V through sustained scan-and-transmit sequences, and shut off cleanly at the low-voltage threshold rather than hard-dropping mid-session.
• First-install charging protocol for CP55/CP50: After installing, place the scanner in its cradle for a full charge cycle before deploying it on the floor. The scan trigger inrush current is highest when the cell sits near minimum charge — a pre-charged pack prevents false BMS trips on the first shift when both the laser and radio fire simultaneously.

Cradle showing a charging error on a new BA-0053A3 pack

The CP55 cradle reads pack state through gold contact pads on the battery face. If those contacts have residue from packaging, sweat, or warehouse dust, the dock sees high resistance on the communication line and flags a fault rather than initiating a charge cycle. Wipe the battery contacts and the cradle contacts with a dry lint-free cloth, reseat the pack firmly until you feel the latch click, then check the charge LED. If the error clears, the contacts were the issue — not the pack or the cradle electronics.

Scanner losing wireless connection during rapid scan bursts

During a fast scan burst, the CP55 fires the imager and transmits data over its wireless radio at nearly the same instant — both draw current simultaneously. If the battery cell is partially discharged, voltage can momentarily sag below the radio module's minimum operating threshold, causing the wireless link to drop mid-burst. This is a cell-load issue, not a radio fault. Keep the pack above 3.6V during heavy shifts — if disconnects happen repeatedly late in the shift, charge the battery before the next pick run rather than running it to cutoff.