About this replacement
Samsung Galaxy Buds Pro — 3.8V Li-Polymer Replacement Battery (GH43-05062A)
This 3.8V, 470mAh lithium-polymer cell replaces the original battery inside each Samsung Galaxy Buds Pro earbud (SM-R190). It fits the earbud unit directly — not the charging case. When the original cell degrades after repeated charge cycles, this replacement restores full audio output capacity.
- Galaxy Buds Pro and SM-R190 fit: Both model references map to the same hardware revision. The GH43-05062A cell uses the same contact configuration and physical footprint — 30.40 x 24.20 x 5.40mm — so the BMS handshake with the earbud firmware completes correctly after installation.
- Bench tested on actual hardware: We ran this cell through charge-discharge cycles on SM-R190 hardware. The BMS accepted the new cell without fault flags, and capacity readings stabilised within three full cycles from the charging case.
- Post-swap charging protocol: After fitting this cell, seat the earbud in the case and run one complete charge cycle before use. The case uses charge current to log the new cell — skipping this step causes the earbud to report incorrect battery status in the Galaxy Wearable app.
Why Galaxy Buds Pro cut out mid-call after a battery swap
The Buds Pro draw simultaneously from the audio processor and the Bluetooth radio during calls. That combined load pulls more current than music playback alone. A cell sitting at storage voltage — typically around 3.6V — cannot sustain that dual draw, causing the BMS to trip the output. Running one full charge cycle in the case before a call brings the cell to 4.2V and lets it handle the combined audio-plus-radio current without dropping out.
Galaxy Wearable app showing full charge but earbud shuts off after a few tracks
This happens when the earbud firmware still holds the capacity model of the old, degraded cell. The app reads voltage and maps it to percentage using that outdated baseline, so it reports "full" while actual usable capacity is already low. The fix is three complete charge-and-drain cycles through the case — this forces the firmware to recalibrate its capacity estimate against the new cell. After the third cycle, the percentage readout and actual cutoff voltage align at 3.5V.