BAT-610 Acer CloudMobile S500 Replacement Battery 3.7V 1460mAh

Acer CloudMobile S500 — 3.7V Li-ion Replacement Battery (BAT-610)

This is a 3.7V, 1460mAh Li-ion replacement battery for the Acer CloudMobile S500 smartphone. It fits the OEM slot directly using part number BAT-610 (also listed as BT.0010S.006). Swap it in when the original cell no longer holds a useful charge across a normal day of calls, messaging, and app use.

• CloudMobile S500 fitment: All S500 variants use the same 3.7V single-cell configuration with the BAT-610 connector pinout and BMS handshake — one part number covers the full production run.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on S500-class hardware. The BMS accepted the new cell without rejection flags, and the protection circuit tripped correctly at the low-voltage cutoff threshold during deep-draw testing.
• Fuel gauge recalibration on first use: After installing this battery, disable fast charging and run one full discharge-to-charge cycle before normal use. The S500's fuel gauge IC is calibrated to the old cell's discharge curve — one full cycle lets it map the new cell's actual capacity and voltage profile before high-current charging begins.

Why the S500 reports wrong battery percentage after a cell swap

The S500 uses a coulomb-counting fuel gauge IC that tracks charge state against a stored discharge curve from the original cell. When a new cell goes in, the IC still references the old curve, so the percentage shown on screen can be off by 10–20%. This is not a fault with the replacement battery. One complete discharge-charge cycle — draining to auto-shutdown, then charging uninterrupted to 100% — forces the IC to rebuild its reference map against the new cell's actual behaviour.

Sudden shutdown at 20–30% on the replacement cell

This happens when the cell voltage drops below the modem or display load threshold before the fuel gauge reads zero — a voltage cliff where the cell cannot sustain current under a high-draw event like an LTE burst or screen-on spike. On a freshly installed cell, the fuel gauge IC has not yet mapped where this cliff sits. Run the first full calibration cycle described above, then check whether the shutdowns continue. If the phone still cuts out at 25–30% after two full cycles, confirm with a multimeter that the cell rests at or above 3.6V when the phone is off — anything below 3.5V at rest after a full charge points to a cell issue rather than a calibration issue.