Amazfit GTR 4 47mm Compatible Battery 3.87V 470mAh PL412631 4S1P US18650VT3 This is the BMS and

This is the BMS and driver interacting at the edge of cutoff voltage

The BMS accepted the cell without fault indication

and CE certifications help ensure safe

BMS cutoff on motor-start inrush surge

check that the battery connector is fully seated — a high-resistance contact causes voltage drop under load at the same 20–30% range

Amazfit GTR 4 47mm Compatible Battery 3.87V 470mAh PL412631 4S1P US18650VT3 This is the BMS andAmazfit GTR 4 47mm 3. 87V Li Polymer Replacement Battery (PL412631) This is a 3. 87V, 470mAh lithium polymer cell for the Amazfit GTR 4 47mm smartwatch. It replaces part number PL412631 and fits the 47mm case only not the GTR 4 Mini or any other GTR variant. Swap it when the original cell no longer holds charge through a full day of GPS and heart rate tracking. GTR 4 47mm fit: The GTR 4 47mm uses a dedicated cell footprint 31. 40 x 25. 90 x 4. 00mm