LG Optimus Pad V900 Compatible Battery 3.7V 6400mAh

LG Optimus Pad V900 — 3.7V Li-Polymer Replacement Battery (SBPP0028901)

This is a 3.7V, 6400mAh Li-Polymer replacement battery for the LG Optimus Pad V900 and V909 tablets. It also fits the LG Optimus Pad L-06C, the Japanese carrier variant sold by NTT Docomo. The OEM part numbers it replaces are SBPP0028901 and BL-T1.

• V900, V909, and L-06C compatibility: These three models share the same physical cell footprint, 3.7V voltage rail, and BMS handshake protocol. The 132 × 100 × 5.50mm cell fits the chassis of all three without modification.
• Bench tested on actual hardware: We ran this cell on a V900 unit and confirmed the BMS accepted the charge cycle, reported state-of-charge correctly through the Android battery API, and held the 3.7V nominal rail under combined display and Wi-Fi load without voltage sag tripping the protection circuit.
• Fuel gauge reset after installation: After fitting this battery, run the tablet down to automatic shutoff, then charge it uninterrupted to 100%. This one full cycle recalibrates the fuel gauge IC against the new cell's actual capacity curve and clears the inaccurate percentage readings that commonly appear after a swap.

Tablet shutting down at 15–25% remaining after battery swap

This is the most common complaint after fitting a new cell. The fuel gauge IC on the V900 retains the capacity curve of the old, degraded battery in its register. When the new cell still has usable charge, the IC thinks it has hit empty and triggers a shutdown. It is not a fault with the replacement cell — it is a calibration mismatch. Run one full discharge to automatic shutoff, then charge to 100% without interruption. After that cycle, the IC recalibrates and shutdowns at low percentages stop.

Android reporting wrong battery percentage on the V900 after replacement

The V900's battery percentage comes from the fuel gauge IC, not a direct voltage read. That IC learns the capacity of the installed cell over charge cycles — swap the cell and its stored profile no longer matches. You will see jumps, drops, or a stuck percentage. The fix is the same calibration cycle: discharge to shutoff, then charge uninterrupted to 100%. After two full cycles, the reported percentage should track actual charge within a few percent. Check the battery screen under Android Settings after each cycle to confirm the curve is stabilising.