Midland BTX1 Replacement Battery 3.7V 950mAh Li-Polymer

Midland BTX1 / BTX2 / BTNext / BTFM — 3.7V Li-Polymer Replacement Battery (752068PL)

This 3.7V, 950mAh Li-Polymer cell replaces part number 752068PL in the Midland BTX1, BTX2, BTNext, and BTFM wireless headsets. These are Bluetooth motorcycle communication headsets that run audio, DECT radio, and intercom functions from a single compact cell. Swap it when the original pack no longer holds enough charge to complete a ride.

• BTX1 / BTX2 / BTNext / BTFM shared platform: All four models draw from the same 3.7V rail and use an identical connector and cell footprint at 67.05 × 19.50 × 6.92mm. The BMS in each unit reads the same protection thresholds, so one cell fits without firmware or connector modification.
• Bench tested on actual hardware: We cycled this cell under combined Bluetooth audio and intercom radio load. The BMS maintained stable voltage through sustained dual-function draw and tripped correctly at the low-voltage cutoff — no premature shutdowns recorded during testing.
• First charge after fitting: Seat the headset in the base station and run a full charge cycle before your first ride. The BTX series base station logs the new cell during this cycle — without it, the talk-time indicator reads inaccurately and may show full when the cell is still at storage voltage.

Why the BTX1 cuts out mid-call on combined audio and intercom draw

The BTX1 runs Bluetooth audio and the DECT intercom radio simultaneously during group rides. That combined draw creates short current spikes the aged original cell cannot sustain without voltage dropping below the BMS cutoff threshold. A fresh cell with full capacity handles these spikes without triggering the protection circuit. If dropouts occur even on a new cell, check that the first full charge cycle in the base station was completed — an under-initialised cell behaves like a partially depleted one under load.

Base station shows charging error or won't recognise the new pack

This happens when the replacement cell arrives at storage voltage — typically around 3.6V — and the base station's BMS handshake fails to complete on the first connection. Remove the headset, reseat it firmly in the cradle, and leave it undisturbed for at least 15 minutes. If the error clears, allow the full charge cycle to finish before use. If the error persists, measure cell voltage at the contacts — anything below 3.0V means the cell has over-discharged in transit and needs a recovery charge via a compatible Li-Polymer charger before the base station will accept it.