Lenovo IdeaPad A3000 Compatible Battery L12T1P33 3.7V

Lenovo IdeaPad A3000 Series — 3.7V Li-Polymer Replacement Battery (L12T1P33)

This 3.7V 3650mAh Li-Polymer battery replaces the OEM cell in the Lenovo IdeaPad A3000, A3000-H, A1010, and A1010-T. It fits the 10-inch Android tablet released around 2012 where the original Li-Polymer pouch cell has degraded. Voltage and capacity match the L12T1P33 and L12D1P31 OEM part numbers exactly.

• IdeaPad A3000 and A1010 platform fit: These models share the same flat pouch cell footprint, 3.7V nominal voltage rail, and connector pinout — the same replacement cell services the full variant range without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the A3000 platform. The charge IC accepted the new cell without faults, BMS communication remained stable, and the protection circuit tripped correctly at low-voltage cutoff.
• Fuel gauge recalibration after swap: After installing this battery, run one full discharge to automatic shutoff, then charge uninterrupted to 100%. This resets the fuel gauge IC calibration against the new cell and clears the inaccurate percentage readings that typically appear after a battery swap on this tablet.

Why the IdeaPad A3000 shuts down at 15–25% remaining

The A3000 runs a combined display-plus-WiFi load that draws enough current to create a sharp voltage sag near the low end of the discharge curve. When the cell voltage dips below the BMS cutoff threshold under that load — even briefly — the tablet interprets it as a depleted cell and shuts down before the percentage indicator reaches zero. A new cell with full capacity reduces this sag because internal resistance is lower. After one full recalibration cycle, the fuel gauge maps the new discharge curve correctly and the early shutdowns stop.

IdeaPad A3000 reporting incorrect battery percentage after replacement

The fuel gauge IC on the A3000 board stores a learned discharge curve from the old cell. When a new cell goes in, that stored map no longer matches actual cell behaviour, so the percentage reading drifts — often jumping or dropping unexpectedly. The fix is one full calibration cycle: drain the tablet to automatic shutoff, then charge to 100% without interruption. After that single cycle, the gauge IC re-anchors its endpoints to the new cell and percentage readings stabilise.