About this replacement
Lenovo IdeaPad A1 Series — 3.7V Li-Polymer Replacement Battery (H11GT101A)
This 3.7V, 3350mAh lithium-polymer battery replaces the original cell in the Lenovo IdeaPad A1, A1, and A1-07 tablets. It matches OEM part numbers H11GT101A, L10C1P22, and 121500028. Capacity is 12.4Wh — matching the original specification.
- IdeaPad A1 and A1-07 compatibility: Both tablet variants share the same mainboard voltage rail, connector pinout, and BMS communication protocol, which is why a single cell covers the full A1 lineup. Swapping between these models does not require firmware changes or connector adapters.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on an IdeaPad A1-07 unit. The BMS accepted the new cell without fault codes, voltage sat steady at 3.7V nominal, and the charge IC handed off cleanly at full capacity.
- Fuel gauge reset after installation: After fitting this battery, run the tablet down to automatic shutoff from a full charge, then charge uninterrupted to 100%. This single full cycle resets the fuel gauge IC calibration against the new cell and clears the inaccurate percentage readings that commonly appear right after a swap.
IdeaPad A1 shutting down between 15–25% remaining
The IdeaPad A1 combines display backlight and WiFi on the same power rail. Under that combined load, voltage drops faster than the fuel gauge expects, and the protection circuit trips before the percentage reaches zero. This happens most often when the fuel gauge is still calibrated to the old, degraded cell. One full discharge-to-shutoff cycle followed by an uninterrupted full charge resets the gauge against the new cell's actual voltage curve and stops the early cutoff.
Battery percentage jumping or dropping faster than expected from 100%
After a cell swap, the tablet's fuel gauge IC still holds the charge curve data from the original battery. The mismatch between stored calibration and the new cell's actual output causes percentage readings to drop in uneven steps or fall faster than expected early in the discharge. This is not a fault with the replacement cell — it is a calibration drift issue. Fix it by completing one full discharge to automatic shutoff, then charging uninterrupted to 100%; after that cycle the gauge reads accurately against the new cell's 3.7V nominal curve.