About this replacement
LG V10 / VS990 / H960 Series — 3.8V Li-Polymer Replacement Battery (BL-45B1F)
The BL-45B1F is a 3.8V, 2500mAh lithium-polymer cell that powers the LG V10 and its carrier variants including the VS990 and H960. It fits 34+ model numbers across the V10 line, all sharing the same connector, footprint, and BMS handshake. Swap it out when the original cell no longer holds a usable charge or the phone shuts down unexpectedly under load.
- V10 variant compatibility: The VS990, H960, and H960YK all run the same 3.8V power rail, use an identical 5-pin connector, and expect the same BMS communication protocol — which is why one cell covers all of them without modification.
- Bench tested on actual hardware: We cycled this cell on a VS990 unit and confirmed the BMS accepted charge handshake on the first connection, held voltage above 3.6V through a full screen-on discharge, and triggered low-battery cutoff cleanly at 3.4V without an abrupt shutdown.
- Fuel gauge recalibration on first use: 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 state.
Sudden shutdown at 20–30% on the replacement cell
This is a voltage cliff issue, not a capacity problem. The LG V10's Snapdragon 808 modem and QHD display draw current spikes that briefly pull cell voltage below the BMS cutoff threshold — even when the reported percentage looks safe. A fresh cell with an uncalibrated fuel gauge IC makes this worse because the coulomb counter still holds parameters from the degraded original cell. Run one full discharge to auto-off, then charge uninterrupted to 100% without unplugging early. After that cycle, the fuel gauge IC recalibrates its empty-cell voltage reference and the shutdowns typically stop.
Phone not powering on after the battery sat in storage
Lithium-polymer cells discharged below approximately 2.5V trigger a BMS lockout to prevent unsafe charging of a deeply depleted cell. If the V10 shows no response and no charge indicator after connecting a cable, the cell is likely in lockout. Plug into a wall adapter — not a computer USB port — and leave it connected for 20–30 minutes without pressing the power button. The charge IC will trickle current into the cell until voltage climbs above 3.0V, at which point the BMS exits lockout and normal charging resumes.