About this replacement
Lenovo Yoga 11E 5th Gen — 11.4V Li-Polymer Replacement Battery (01AV487)
This 11.4V, 3650mAh (41.61Wh) Li-Polymer battery replaces the original cell in the Lenovo Yoga 11E 5th Generation and ThinkPad Yoga 11e 5th Gen convertible laptops. It matches the OEM voltage and capacity spec, including variants running part numbers L17M3P56, L17L3P56, SB10K97631, and SB10T83129. Physical dimensions are 275.70 x 111.62 x 5.90mm — verify clearance before installation.
- Yoga 11E 5th Gen compatibility: These models share a common 11.4V three-cell Li-Polymer architecture with an identical connector pinout and BMS handshake protocol. Part numbers 01AV486, 01AV487, 5B10W13886, and 5B10W13891 are interchangeable across this generation because Lenovo sourced cells from two suppliers — the BMS firmware treats both identically.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Yoga 11E 5th Gen unit. The BMS communicated correctly with the EC, charge current stepped down properly at the CV phase, and no protection trips occurred during load.
- Post-install calibration on the Yoga 11E: After fitting this battery, run the laptop down to hibernate-cutoff under normal use, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.
BIOS reporting poor battery health immediately after replacement
The Lenovo EC reads EEPROM data burned during the previous cell's life cycle. When a new cell goes in, the stored cycle count and capacity data from the old battery still sits in firmware, so BIOS flags the replacement as degraded before it has run a single cycle. This is not a fault with the new cell. Run one full discharge-to-hibernate followed by an uninterrupted charge to 100% — the BIOS battery learn cycle rewrites the EEPROM baseline against the new cell's actual chemistry. After one or two cycles, the health reading normalises.
Laptop shuts down at 20–30% remaining shown on screen
This happens when the fuel gauge IC has not yet calibrated against the new cell's voltage curve. Under combined CPU and display load, the cell voltage drops faster than the uncalibrated gauge predicts, crossing the low-voltage protection threshold while the OS still shows charge remaining. The shutdown is the EC cutting power at its hardware floor — typically around 10.2V for an 11.4V three-cell pack — not a battery defect. Run two full calibration cycles from hibernate-cutoff to 100% charge, and the gauge accuracy will track within a few percent of actual remaining capacity.