Lenovo Yoga 730 L17C3PE0 Compatible Battery 11.25V 4500mAh

Lenovo Yoga 730 Series — 11.25V Li-Polymer Replacement Battery (L17C3PE0)

This is an 11.25V, 4500mAh (50.63Wh) lithium-polymer replacement battery for the Lenovo Yoga 730 2-in-1 convertible notebook. It fits the Yoga 730-13IKB, Yoga 730-15IWL, Yoga 730-2U, and over a dozen additional Yoga 730 variants. OEM part numbers L17C3PE0 and 5B10Q39196 both cross-reference to this cell.

• Yoga 730 platform compatibility: All listed Yoga 730 variants share the same three-cell Li-Polymer configuration, 11.25V nominal rail, and EC connector pinout. The BMS handshake protocol is consistent across the 13-inch and 15-inch chassis, so one cell covers the full range.
• Bench tested on actual hardware: We ran this cell through charge, full-load discharge, and BMS communication checks on the Yoga 730 platform. The EC recognised the cell immediately, reported correct Wh capacity, and the charge circuit held the expected taper profile without fault codes.
• Post-install calibration on the Yoga 730: After fitting this cell, run one full discharge to hibernate cutoff, then charge uninterrupted to 100% without unplugging. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears routinely after any cell swap on Lenovo convertibles.

Why the Yoga 730 shuts down between 20–30% after a battery swap

The Yoga 730's fuel gauge IC stores a charge model calibrated to the old cell's internal resistance curve. A new cell has a different voltage-to-capacity slope, so the gauge miscalculates the remaining charge. Under full CPU and display load, the actual cell voltage drops below the EC's cutoff threshold while the OS still shows 20–30% remaining. The fix is two to three full discharge-and-charge cycles so the fuel gauge IC re-maps against the new cell. After calibration, the shutdown point drops back to the expected low-single-digit percentage.

BIOS reporting battery health as "poor" or "replace soon" after fitting a new cell

The Yoga 730 BIOS reads cycle count, design capacity, and health flags stored in the battery's EEPROM. A replacement cell ships with fresh EEPROM data that the BIOS hasn't yet validated against real charge cycles, triggering a false health warning on first boot. This is not a fault with the cell. Boot into the Lenovo Vantage app or run the BIOS battery diagnostic, then complete one full learn cycle — the warning clears once the EC writes new baseline data to the EEPROM, typically after the first uninterrupted charge to 100%.