Honeywell CT37-BTSC-001 Barcode Scanner Replacement Battery 3.87V 3700mAh

Honeywell CT30 XP Mobile Computer — 3.87V Li-ion Replacement Battery (CT37-BTSC-001)

This 3.87V, 3700mAh (14.32Wh) lithium-ion battery replaces the original pack in the Honeywell CT30 XP Mobile Computer and CT37. It fits retail, warehouse, and logistics deployments where the scanner runs through full pick-and-pack shifts. Voltage and connector match the OEM spec exactly.

• CT30 XP and CT37 platform fit: Both models run on the same 3.87V cell architecture with a shared BMS handshake protocol. The connector pinout and communication lines are identical across the CT30 XP and CT37, so one pack covers both.
• Bench tested on actual hardware: We ran this pack on a CT30 XP unit and monitored the BMS through scan-trigger cycles and wireless polling bursts. The protection circuit held within spec under combined radio and imager load — no unexpected cutoff during burst scanning.
• First-shift prep for CT30 XP users: After installing, seat the scanner in its cradle and complete a full charge cycle before going live on the floor. The scan trigger inrush is highest when the cell is near its minimum — a fully charged pack prevents false BMS trips on the first pick run of the shift.

Cradle showing a charging error on a new CT30 XP battery pack

The CT30 XP cradle communicates with the battery BMS through the dock contacts. If those contacts have residue or oxidation from the old pack, the dock reads a handshake fault and flags a charging error — even with a brand-new cell seated. Wipe the gold contacts on the battery and inside the cradle slot with a dry, lint-free cloth, then reseat the pack firmly. The BMS re-initialises on the next insertion and the cradle clears the fault. If the error persists after two reseats, confirm the cradle output voltage is reaching 4.2V at the contact pins.

Scanner losing wireless connection during rapid barcode scan bursts

On the CT30 XP, the imager and wireless radio draw simultaneously during a fast scan burst — the imager fires, the radio transmits the decoded data, and both pull current in the same window. If the cell voltage sags below the radio module's minimum operating threshold during that combined draw, the wireless stack drops the connection before the BMS trips the pack. This is more common when the battery is below 20% charge or when ambient temperature is above 35°C, which raises internal resistance. Keep the cell above 30% during high-frequency scan runs and check that the device's radio transmit power setting is not at maximum if the connection drops are recurring.