Google G16 Replacement Battery BA S570 3.7V 1200mAh

Google G16 — 3.7V Li-ion Replacement Battery (BA S570)

This is a 3.7V, 1200mAh lithium-ion replacement battery for the Google G16 smartphone. It fits directly in place of the original BA S570 cell. Cross-reference part numbers include BH06100, 35H00156-00M, and 35H00155-00M — all refer to the same physical cell.

• G16 fit specifics: The G16 uses a compact 51 × 36 × 6mm cell with a fixed connector pinout tied to the phone's fuel gauge IC. This cell matches those dimensions and the connector layout exactly, so the BMS handshake completes at first boot.
• Bench tested on actual hardware: We ran the cell through a full charge-discharge cycle on the G16 platform and monitored BMS communication. The fuel gauge IC accepted the new cell, charge termination triggered correctly at 4.2V, and no fault codes were logged.
• First-cycle fuel gauge recalibration: On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard rate. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell — preventing erratic percentage readings from the start.

Sudden shutdown at 20–30% on the G16 after a cell swap

This happens because the fuel gauge IC is still running the discharge curve from the old, degraded cell. When the new cell's actual voltage drops under modem or screen load, the IC misreads it as deeper than it is and the phone shuts down before reaching 0%. The fix is one full discharge-charge cycle with no fast charging — this forces the coulomb counter to rebuild its reference table against the new cell. After that cycle, the cutoff threshold aligns correctly and shutdowns at 20–30% stop.

G16 feels warm near the battery during the first charge after replacement

A new cell starts with higher internal impedance than a broken-in cell. The charge IC maintains its target current regardless, so more energy converts to heat in the cell during early cycles. This is normal and tapers off after two or three full charge cycles as the cell's impedance drops. If warmth continues past the third cycle or the phone gets hot rather than warm, check that the charge IC has not defaulted to an elevated charge rate — verify the charging mode shows standard rather than fast charge in the battery settings.