Logitech UE310 Replacement Battery 3.7V 180mAh

Logitech UE310 / UE3500 / UE4500 — 3.7V Li-Polymer Replacement Battery (533-000069)

This 3.7V 180mAh (0.67Wh) lithium-polymer cell replaces the original 533-000069 battery in the Logitech UE310, UE3500, and UE4500 wireless mono headsets. It fits the compact housing directly and connects to the same BMS circuit as the factory cell. Use the Fit Model list above to confirm your unit before ordering.

• UE310 / UE3500 / UE4500 shared platform: These three headsets use the same 3.7V cell footprint, connector pinout, and BMS handshake protocol. Swapping between models is not possible, but the replacement cell speaks the same voltage and capacity signal the base station expects to see.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the UE310 platform. The BMS accepted the pack without fault codes, held the charge floor at the expected cutoff voltage, and showed no thermal anomaly under sustained audio and radio draw.
• First-cycle base station logging: Seat the headset in the base cradle and let it complete one full uninterrupted charge before making any calls. The base station calibrates its talk-time counter against the new cell during that first cycle — skipping it causes the indicator to misread remaining capacity for days.

Why the UE310 cuts out mid-call on a replacement battery

The UE310 draws simultaneously from the audio codec and the Bluetooth radio during a call. That combined load creates brief current spikes the BMS treats as an over-draw event if the cell is not yet conditioned. A freshly installed cell sitting at storage voltage — typically around 3.6V — has not yet established the internal resistance baseline the BMS uses to judge safe draw. The result is an early protection cutoff that looks like a dying battery. Running three to five full charge-discharge cycles through the base station corrects this.

Base station showing a charging error after fitting the new cell

If the base displays a flashing or amber error indicator after the new pack is installed, the BMS handshake has not completed. This happens when the headset is placed in the cradle while the cell voltage is outside the expected window — either too low from shipping storage or too high from a partial pre-charge. Remove the headset, wait thirty seconds, then re-seat it firmly. If the error persists, confirm the cradle contacts are clean and the cell voltage reads at least 3.5V before attempting another charge cycle.