About this replacement
Samsung SCH-S370 / SCH-S470 Series — 3.7V Li-ion Replacement Battery
This is a 3.7V, 1150mAh Li-ion cell replacement for the Samsung SCH-S370, SCH-S375, and SCH-S470 feature phones. It slots into the original battery bay and connects to the same three-contact terminal used across this phone series. Capacity is 1150mAh — identical to the original Samsung specification.
- SCH-S370 / S375 / S470 compatibility: These three models share the same battery bay dimensions, voltage rail, and three-pin contact layout. The BMS on each handset uses the same charge termination voltage of 4.2V, so one cell works across all three without any electrical conflict.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the SCH-S470 platform. The BMS accepted the cell without fault codes, terminated charge cleanly at 4.2V, and the fuel gauge IC tracked state-of-charge correctly after one full conditioning cycle.
- Fuel gauge recalibration on first use: On first install, run the phone down to automatic shutdown, then charge uninterrupted to 100% before normal use. The SCH-S370's fuel gauge IC was calibrated to the original cell's discharge curve — one full cycle rewrites that reference point against the new cell so percentage readings stay accurate.
Why the SCH-S370 shows wrong battery percentage after a cell swap
The SCH-S370 uses a fuel gauge IC that tracks charge by counting coulombs against a stored discharge curve from the original cell. Swap in a new cell and that stored curve no longer matches actual chemistry — the gauge reads against the wrong baseline. This causes the percentage to read high early in discharge and then drop sharply near the end. One complete discharge-to-shutdown followed by an uninterrupted charge to 100% resets the coulomb counter reference and corrects the readout.
Sudden shutdown at 20–30% on the replacement cell
This happens when the cell voltage drops below the BMS cutoff threshold under load — even though the fuel gauge still shows charge remaining. On the SCH-S370, tasks like active calls or screen-on browsing pull enough current to create a voltage sag that trips the BMS protection circuit before the gauge catches up. The root cause is usually the fuel gauge IC still running on the old cell's discharge curve, overestimating remaining capacity. After one full recalibration cycle, the gauge and the BMS cutoff align — target a full drain to auto-shutdown and a clean charge back to 4.2V.