About this replacement
Microsoft Xbox One Wireless Controller — 3V Li-ion Replacement Battery (1556)
This is a 3V, 1100mAh Li-ion cell built to fit the Microsoft Xbox One Wireless Controller (model 1556). It also fits the Xbox One S Controller and related Xbox One controller variants that share the same internal battery bay and connector. Swap it when the original cell no longer holds charge through a full play session.
- Xbox One controller platform fit: The Xbox One, Xbox One S, and related wireless controllers share the same battery bay geometry, connector pin-out, and 3V nominal voltage rail. One replacement cell covers the full platform.
- Bench tested on actual hardware: We ran this cell in an Xbox One Wireless Controller and confirmed the BMS accepted the charge handshake on first connection. The controller powered on immediately and the charge IC cycled normally through to termination without fault flags.
- Fuel gauge calibration on first use: After installing, run one complete wireless play session to automatic cutoff before recharging. The Xbox One controller's fuel gauge IC sets its empty reference point against the first full discharge cycle — skipping this step can leave the gauge reading inaccurately for several sessions.
Controller disconnecting before the battery indicator reaches empty
The Xbox One wireless radio and rumble motors pull current simultaneously during intense gameplay. A cell with even minor capacity fade can't sustain that combined load, and voltage sags below the controller's cutoff threshold before the fuel gauge shows low. This causes an abrupt disconnect — the controller doesn't warn you first. A fresh cell at rated capacity eliminates the sag. After fitting this replacement, run a full discharge cycle so the gauge IC recalibrates its sag compensation curve against the new cell's actual output.
Fuel gauge jumping or showing wrong percentage after a cell swap
Replacing the cell resets the fuel gauge IC's learned discharge curve — it no longer knows where "empty" sits on the new cell's voltage profile. This causes the percentage to jump up or down erratically for the first few sessions. The IC recalibrates automatically over three to five full charge and discharge cycles. To speed this up, complete one uninterrupted wireless session from full charge to automatic controller shutoff, then recharge fully — this gives the gauge IC a clean reference point to anchor to.