Lenovo Pad 2024 TB331FC Compatible Battery L23B2P31 6800mAh

Lenovo Pad 2024 TB331FC / Tab M11 — 3.91V Li-Polymer Replacement Battery (L23B2P31)

This 3.91V, 6800mAh (26.59Wh) lithium-polymer battery fits the Lenovo Pad 2024 TB331FC, TB331FU, and Tab M11 tablets. It replaces OEM part numbers L23B2P31, L23C2P31, L23D2P31, L23L2P31, L23M2P31, SB18D95067, SB18E09198, and SB18E23791. If your tablet no longer holds a charge or shuts down unexpectedly, this is a direct cell replacement.

• TB331FC, TB331FU, and Tab M11 compatibility: These three models share the same battery bay dimensions (167.20 × 96.00 × 2.60mm), the same 3.91V nominal voltage rail, and the same connector pinout. The BMS handshake protocol is identical across the Pad 2024 and M11 hardware revisions, so one cell fits all three without modification.
• Bench tested on actual hardware: We cycled this cell on a TB331FC unit and monitored BMS communication throughout charge and discharge. The protection circuit engaged correctly at low-voltage cutoff, and charge termination triggered cleanly at full capacity with no overcharge events.
• Fuel gauge recalibration after swap: After installing this battery, run the tablet down to automatic shutoff — do not force-close it — then charge uninterrupted to 100% without using the device. This single full cycle resets the fuel gauge IC against the new cell's actual capacity curve and clears the inaccurate percentage readings that almost always appear after a battery swap.

Tablet shutting down at 15–25% on the Pad 2024

The Pad 2024 drives a high-resolution display and maintains active WiFi simultaneously — this creates brief but sharp current spikes that aged or freshly installed cells handle differently. When the fuel gauge IC is miscalibrated, the reported percentage drifts above the cell's actual remaining charge. The SoC cuts power when the cell voltage drops below its protection threshold, which can happen while the screen still shows 20% or more. One full discharge-to-shutoff cycle followed by an uninterrupted charge to 100% corrects the calibration and eliminates these early cutoffs.

Fast charging unavailable after battery replacement on the Tab M11

After a cell swap, the charge IC on the Tab M11 sometimes defaults to standard 5W charging until it completes one accepted USB-PD negotiation cycle with the new battery. This is not a fault with the replacement cell — it is the charge controller being cautious with an uncalibrated pack. Plug in using the original Lenovo charger and cable and let the tablet charge fully to 100% without interruption. Fast charging typically resumes from the second charge cycle onward once the controller has logged a successful full-charge event.