About this replacement
Logitech Ultrathin Touch Mouse T630 / N-R0044 — 3.7V Li-Polymer Replacement Battery (1311)
This 3.7V, 230mAh Li-Polymer battery replaces the original cell in the Logitech Ultrathin Touch Mouse T630 and N-R0044 wireless peripheral. It matches OEM part numbers 1311, AHB521630PJT-01, and 533-000069. Dimensions are 32.12 × 14.65 × 5.80mm — exact fit matters in this thin-profile housing.
- T630 and N-R0044 platform: Both devices share the same flat Li-Polymer cell format, voltage rail, and connector pinout. The BMS in each unit expects a 3.7V nominal cell with the same charge termination threshold — swapping the original for this unit does not require firmware changes or pairing resets caused by power interruption alone.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the T630 platform. The BMS accepted the cell without fault flags, charged to 4.2V cutoff, and balanced the protection circuit correctly at low-voltage cutoff around 3.0V.
- Post-swap mouse behaviour: After replacing the internal cell, the T630 may lose its Bluetooth pairing due to full power loss during the swap. Hold the connect button on the underside of the mouse for three seconds, then re-pair from your device's Bluetooth settings — this is a one-time step.
Keyboard pairing lost after battery swap in the N-R0044
When the N-R0044 loses all power during a battery replacement, the pairing state stored in volatile memory clears. This is not a fault with the new cell — it is how the device handles a cold-start condition. After installing the new battery, press and hold the pairing button until the status LED blinks rapidly, then re-add the device in your OS Bluetooth menu. The connection restores at that point with no further steps needed.
Mouse pointer stuttering or lagging before the battery fully died
The T630 reduces its Bluetooth polling rate as cell voltage drops below roughly 3.2V — this is the BMS protecting the cell, not a connection problem. Users often see intermittent cursor lag or skipped movement before the mouse shows a low-battery alert. If the stuttering appeared gradually over days, the cell had already entered end-of-life degradation. After fitting this replacement and charging to 4.2V, the polling rate returns to normal operating frequency.