About this replacement
Roku Voice Remote Pro — 3.8V Li-Polymer Replacement Battery (BGG047)
This is a 3.8V, 1000mAh Li-Polymer battery for the Roku Voice Remote Pro (model BGG047). It fits the rechargeable remote used to control Roku streaming devices, restoring both voice command and standard button functions. Capacity figure is taken directly from the product spec — 1000mAh / 3.8Wh.
- Voice Remote Pro compatibility: The BGG047 board draws from a single Li-Polymer cell running at 3.8V nominal. The microphone circuit for voice commands stays active in standby, so the cell needs to hold voltage steadily — not just during button presses.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the BGG047 board. The BMS accepted the cell without errors, and the charging circuit brought it to full capacity without triggering protection cutoff.
- Reconnection after swap: After fitting this battery, hold any button for five seconds to wake the remote before re-pairing. The BGG047 firmware requires a manual wake cycle — the remote will not auto-reconnect from a fully discharged or replaced cell state.
Why the Voice Remote Pro drains faster when voice search is used heavily
The BGG047 remote keeps its microphone circuit in a low-power listening state between voice activations. Each voice command pulls a short high-current burst to process audio and transmit to the Roku device. A cell that has lost capacity handles those bursts poorly — voltage sags briefly, which the BMS can interpret as a low-battery condition even if the cell shows a charge. A fresh 1000mAh cell handles these spikes without the sag.
Remote shows as charging but percentage never climbs above 10%
This is a dead-cell symptom, not a charging port fault. When a Li-Polymer cell drops below roughly 2.5V, the protection circuit locks it out and the charger can deliver current without actually reconditioning the cell. The Roku app may still display a charging indicator because it detects voltage presence, not true charge acceptance. Fit a new cell and allow a full uninterrupted charge to 4.2V before checking the battery indicator in the Roku app.