Teklogix 7035 Replacement Battery 7.4V 2200mAh Li-ion

Teklogix 7035 / 7035i / 7035if — 7.4V Li-ion Replacement Battery (20605-002)

This 7.4V 2200mAh Li-ion battery replaces the original pack in the Teklogix 7035, 7035i, and 7035if handheld barcode scanners. It matches OEM part numbers 20605-002, 20605-003, and 1916926. These scanners are widely used in warehouse, retail, and logistics environments where scanning uptime is critical.

• 7035 series compatibility: The 7035, 7035i, and 7035if share the same battery bay dimensions, contact layout, and BMS handshake protocol. One pack fits all three variants without modification.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on a 7035if unit. The BMS balanced correctly across both cells, and the protection circuit tripped cleanly at the low-voltage threshold — no forced shutdowns mid-session.
• First-shift preparation: After installing, seat the scanner in its cradle and run a full charge cycle before use. The scan trigger draws a sharp inrush current, and a cell at minimum charge is most vulnerable to a false BMS trip on that first pull of the trigger.

Cradle charging error on a freshly installed pack

Charging docks on the 7035 series use spring-loaded contacts that can accumulate oxidation or debris, especially in warehouse environments. A new pack with clean contacts pressing against dirty dock pins creates enough contact resistance to confuse the charger's current-sense circuit. Wipe the gold contacts on the battery and the dock pins with a dry cloth before reseating. If the error clears, the issue was contact resistance — not the pack itself.

Scanner dropping wireless connection during rapid scan bursts

The 7035 runs its wireless radio and scan imager simultaneously during high-frequency scanning. That combined draw — radio polling plus imager activation — creates a current spike that can momentarily sag the cell voltage. If the BMS reads that sag as an undervoltage event, it will momentarily cut the radio before recovering. A fully charged pack handles the combined inrush better; if drop-outs persist on a charged pack, check that the battery contacts are clean and fully seated to minimise resistance losses.