About this replacement
Pax S910 / QR68 / QR65 / AXS910 — 3.7V Li-ion Replacement Battery (HL0272 / HL0273 / A0661-LF / YW-005)
This is a 3.7V, 2600mAh Li-ion replacement battery for the Pax S910, QR68, QR65, and AXS910 portable payment terminals. It slots directly in place of OEM parts HL0272, HL0273, A0661-LF, and YW-005. If your terminal is dying mid-shift or won't hold a charge through a full trading day, this battery addresses that directly.
- S910 / QR68 / QR65 / AXS910 platform compatibility: These terminals share the same battery bay dimensions, connector pinout, and BMS handshake protocol — all models draw from the same 3.7V cell architecture, so one battery SKU covers the full group without modification.
- Bench tested on actual hardware: We ran this cell through full boot cycles on the S910 platform. The BMS accepted the handshake correctly, charge IC entered top-off mode as expected on first charge, and the terminal's charge indicator updated after one complete power cycle.
- First deployment tip for POS terminals: After installation, complete one full transaction cycle before putting the terminal into a live environment. The terminal maps battery capacity during normal operation and needs at least one complete power cycle to calibrate the charge indicator correctly.
Payment terminal rebooting mid-transaction after battery swap
The S910's receipt printer motor draws a short, sharp current spike each time it fires — typically well above the terminal's idle draw. On a freshly installed cell, the BMS protection circuit can read that spike as an overcurrent event and trip, cutting power mid-transaction. This is a BMS calibration issue, not a faulty battery. Run the terminal through several complete transaction cycles, including receipt prints, to let the BMS learn the load profile. After three to five full cycles the trip threshold stabilises and mid-transaction cutoffs stop.
Terminal not powering on after sitting unused in a drawer
Li-ion cells enter a protection lockout state when they self-discharge below approximately 2.5V — which happens over weeks of storage with no charge top-up. The terminal won't respond to the power button because the BMS has shut the cell off entirely. Connect the terminal to its original charger and leave it for 20–30 minutes without pressing anything. Most chargers send a low-current recovery pulse that brings the cell back above the 2.8V threshold needed to re-initialise the BMS, after which the terminal boots normally.