About this replacement
Point Mobile PM85 / PM90 — 3.85V Li-ion Replacement Battery (85-BTSC)
This is a 3.85V, 3000mAh Li-ion battery carrying OEM part number 85-BTSC. It fits the Point Mobile PM85 and PM90 rugged handheld mobile computers — barcode scanners used in warehouse, retail, and logistics environments. Dimensions are 76.10 × 53.90 × 7.10mm, matching the original pack profile exactly.
- PM85 and PM90 platform compatibility: Both models run the same 3.85V battery architecture and share the 85-BTSC connector footprint and BMS handshake protocol. One pack covers both devices without modification.
- Bench tested on actual hardware: We ran this pack through full charge and discharge cycles on the PM85 platform. The BMS communicated correctly with the device OS, charge acceptance was normal, and no cutoff faults triggered during scan-burst simulation.
- First-shift prep for pick-and-pack use: After installing the new pack, seat the scanner in its cradle for a complete charge cycle before deployment. Scan trigger inrush current peaks when the cell is near minimum — a fully charged cell prevents false BMS trips on the first shift.
Cradle showing a charging error on a new 85-BTSC pack
A new pack sitting in storage accumulates surface oxidation on its contact pads. When dock contact resistance rises above the cradle's threshold, the dock misreads the connection and flags a charge fault — not a battery defect. Wipe the gold contacts on both the pack and the cradle dock with a dry lint-free cloth, then reseat firmly. If the error clears, run a full charge cycle before use. If the error persists after cleaning, check the cradle's spring pins for debris or deformation.
Scanner losing wireless connection during rapid scan bursts
Rapid barcode scanning combines two simultaneous inrush events — the imager firing and the Wi-Fi or Bluetooth radio polling — pulling current that can briefly sag cell voltage below the radio module's minimum operating threshold. The PM85 then drops the wireless session rather than hard-crash. This happens most often when the battery is below 20% state of charge. Keep the pack above that threshold during high-frequency scan shifts, and check that the wireless poll interval in the device settings is not set to its shortest value, which amplifies the combined draw.