Mobile Warming MWBT2 Replacement Battery 7.4V 2000mAh

Mobile Warming Glove Styles — 7.4V Li-Polymer Replacement Battery (MWBT2)

This 7.4V, 2000mAh lithium-polymer battery replaces the MWBT2 pack in Mobile Warming heated glove styles, including Glove Lines, Workmen Gloves, and Barra Gloves. It ships as two cells — one per glove — matching the original dual-pack configuration. Voltage and capacity are spec-matched to the heating elements in these gloves.

• Glove Lines and Workmen compatibility: These glove models share the same 7.4V heating circuit and MWBT2 connector footprint. The BMS in each glove communicates directly with the cell — mismatched voltage or a missing protection circuit will cause the glove to shut off immediately or refuse to activate.
• Bench tested on actual hardware: We cycled both cells through Mobile Warming's three heat settings. The BMS held steady across low and medium draw. On high, the cells pulled close to their rated current ceiling — the protection circuit stayed active and did not trip under normal sustained use.
• First-use heat setting protocol: Start on the low setting for the first 10 minutes on a fresh cell. Heated gloves draw significantly more current at maximum, and the heating elements benefit from a short initial period at lower draw before running at full power.

Why the MWBT2 glove cuts out mid-use on the highest heat setting

The highest heat setting pushes sustained current draw close to the BMS protection threshold. If the cell voltage drops below roughly 6.0V under load — which happens faster in cold air — the BMS interprets it as an unsafe discharge condition and cuts power. This is not a faulty battery. The cell is doing exactly what the protection circuit requires. Switching to medium heat briefly allows the cell voltage to recover, and the glove will reactivate.

Glove not reaching maximum heat level even on a full charge

If the glove runs warm on low and medium but never reaches the expected heat on high, the cell is likely not reaching a full 8.4V at end-of-charge. A degraded or deeply discharged lithium-polymer cell can charge to only 7.8–8.1V, which is enough for lower settings but insufficient for the peak current the high setting demands. Check the charger output first — it should read 8.4V DC at the connector with no load. If the charger is fine, the cell has lost capacity and needs replacement.