About this replacement
Posiflex PG-200 — 3.7V Li-ion Replacement Battery (RB-3000)
This is a 3.7V, 5200mAh Li-ion replacement battery for the Posiflex PG-200 portable data collection terminal. It fits the PG-200 handheld scanner used in retail, inventory, and warehousing environments. The OEM part number is RB-3000.
- PG-200 compatibility: The PG-200 runs a single-cell 3.7V Li-ion architecture. This pack matches the voltage rail, cell format, and BMS handshake that the terminal's charge management circuit expects. Mismatched cell counts or chemistry trigger a protection cutoff — this pack avoids that.
- Bench tested on actual hardware: We cycled this pack through scan-trigger and wireless radio draw simultaneously to confirm the BMS held stable under combined inrush loads. Charge acceptance and cutoff thresholds matched OEM spec across multiple discharge cycles.
- First-shift preparation: After installing, seat the scanner in its cradle and run a full charge cycle before the first pick-and-pack shift. Scan trigger inrush is highest when the cell is near minimum, and a fully charged pack prevents false BMS trips during the first burst of activity.
Cradle showing a charging error on a new RB-3000 pack
A charging error on a new pack is almost always a contact resistance issue, not a fault with the cell itself. The PG-200 cradle reads pack voltage through pogo-pin contacts, and oxidation or debris on either the dock or battery contacts raises resistance enough to trigger an error flag. Wipe the gold contacts on the battery and the cradle pins with a dry lint-free cloth, then reseat the pack firmly. If the error clears within 30 seconds of reseating, the cell is fine — the contact surface was the problem.
Scanner losing wireless connection mid-scan burst
The PG-200 draws simultaneously from the wireless radio and the scan trigger during a rapid scan burst. When the cell voltage sags under that combined inrush load, the device can drop its wireless connection before the BMS trips — the radio loses power first because the scanner prioritises the imager. This typically appears on a degraded original pack but can also occur if a replacement cell was installed at low state of charge. Charge the pack to full before the shift starts and confirm the cradle indicator shows a complete charge cycle — not just a partial top-up.