100+ V5 Replacement Battery 3.8V 2200mAh Li-ion 100B

100+ V5 — 3.8V Li-ion Replacement Battery (100B)

This is a 3.8V 2200mAh Li-ion cell that replaces the original 100B battery in the 100+ V5 and V5100B smartphones. It fits directly into the same battery bay and connects to the same BMS contacts as the factory unit. Capacity figures come from the product data: 2200mAh at 8.36Wh.

• V5 and V5100B platform fit: Both models share the same PCB layout, connector pinout, and BMS handshake protocol — that is why one cell covers both. The 100B part number is the OEM reference for the entire V5 line.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a V5 unit. The BMS accepted the new cell without error flags, charge termination triggered correctly at 4.2V, and low-voltage cutoff activated cleanly rather than hanging the device.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one full discharge-charge cycle from 100% to near-empty and back. This lets the fuel gauge IC map the discharge curve of the new cell before the system applies high charge current to an uncalibrated unit.

Sudden shutdown at 20–30% on the replacement cell

This is a voltage cliff problem, not a capacity problem. Under heavy load — mobile data, GPS, or a bright screen — the new cell's voltage drops faster than the fuel gauge IC expects, because the IC is still running the discharge model it built for the worn original cell. When cell voltage dips below the shutdown threshold, the phone cuts out even though the percentage display reads 20–30%. One full calibration cycle — discharge to automatic cutoff, then a full charge uninterrupted — rewrites the coulomb counter reference and eliminates most cliff shutdowns. If shutdowns continue after two calibration cycles, check that cell voltage at rest reads above 3.6V before use.

OS reporting wrong battery percentage after cell swap

The fuel gauge IC in the V5 stores a learned discharge curve from the previous cell. When a new 2200mAh cell goes in, the IC has no valid reference point for its actual charge profile, so percentage readings jump or stall at incorrect values. This is not a fault with the replacement — it is the IC recalibrating. Let the phone discharge fully until it shuts off on its own, then charge to 100% without interruption. After that single cycle the coulomb counter resets to the new cell's curve and percentage accuracy returns.