Intermec CK3 Barcode Scanner Replacement Battery 3.7V 5200mAh

Intermec CK3 / CK3A / CK3X / CK3R Series — 3.7V Li-ion Replacement Battery (318-034-001)

This 3.7V, 5200mAh lithium-ion battery fits the Intermec CK3, CK3A, CK3X, and CK3R mobile computers — handheld barcode scanners used across retail, logistics, and warehouse operations. It replaces OEM part numbers 318-034-001, 318-033-001, 318-033-021, AB17, and AB18. Capacity is 19.24Wh and dimensions match the original pack at 90.80 × 41.90 × 24.30mm.

• CK3 series compatibility: The CK3, CK3A, CK3X, and CK3R share the same battery bay geometry, connector pinout, and BMS communication protocol — one pack covers all four variants without modification or adapter.
• Bench tested on actual hardware: We ran this pack in a CK3 cradle and cycled it through scan-burst loads combined with simultaneous Wi-Fi polling. The BMS held stable through combined inrush events and reported accurate state-of-charge to the device OS throughout.
• First-shift charging protocol: 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 is near minimum, and a pre-charged pack prevents false BMS trips during your first pick-and-pack shift.

Cradle showing a charging error on a new pack

The CK3 charging cradle communicates with the battery BMS over a dedicated contact before it allows charge current to flow. If that handshake fails, the dock flags a fault and no charging begins. The most common cause is contact resistance from residue or slight misalignment at the pack contacts. Wipe both the pack contacts and the dock pins with a dry cloth, reseat firmly, and the charge indicator should clear within 30 seconds.

Scanner dropping Wi-Fi mid-shift during rapid scan bursts

The CK3 draws simultaneously from two high-current sources during a rapid scan burst — the imager or laser, and the 802.11 radio transmitting the barcode payload. When cell voltage sags under combined load, the radio is the first subsystem the device sheds to protect the processor. This appears as a wireless disconnect rather than a power-off event, which makes the battery easy to overlook as the cause. If disconnects cluster during scan-heavy tasks rather than idle periods, check cell voltage under load — it should hold above 3.4V mid-burst on a healthy pack.