Lenovo IdeaPad 310 15" Compatible Battery 7.6V L15L2PB4

Lenovo IdeaPad 310 15" Series — 7.6V Li-Polymer Replacement Battery (L15L2PB4)

This is a 7.6V, 3,750mAh (28.5Wh) Li-Polymer battery for the Lenovo IdeaPad 310 15" and 310 15" Touch notebooks. It fits the 310-15ISK, 310-15IKB, and over 40 additional IdeaPad 310 variants sharing the same connector and BMS handshake. OEM cross-references include L15M2PB3, L15C2PB5, L15C2PB7, 5B10K88299, and 5B10K90804, among others.

• IdeaPad 310 platform compatibility: Every model in this list runs the same 7.6V two-cell Li-Polymer architecture with an identical edge connector and EEPROM handshake to the BIOS power controller. Swapping between sub-models is safe — the BMS negotiates capacity data directly from the cell's EEPROM, not a hard-coded firmware value.
• Bench tested on actual hardware: We cycled this cell on a 310-15ISK and monitored the BMS through charge and discharge. The protection circuit triggered correctly at the low-voltage cutoff, and the charge IC stepped down from CC to CV mode at the expected 8.5V threshold without false-trip shutdowns.
• Post-install discharge cycle on IdeaPad 310: After fitting this battery, run one full discharge until the laptop hibernates on its own, then charge uninterrupted to 100% without using the machine. This resets the BIOS battery learn cycle and clears the inaccurate "Battery health — poor" flag that almost always appears after a cell swap on this platform.

Why the IdeaPad 310 BIOS reports poor health immediately after a battery swap

The 310's BIOS reads health status from EEPROM data written during the old cell's life — accumulated cycle count, internal resistance estimates, and calibrated full-charge capacity. A new cell arrives with factory EEPROM values that don't match the BIOS's stored baseline, so it flags the mismatch as degraded health. This is a data synchronisation issue, not a fault with the replacement cell. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% lets the BIOS rewrite its baseline against the new cell's actual parameters. After one or two complete cycles, the health indicator corrects itself.

IdeaPad 310 shutting down at 20–30% charge shown on screen

This happens when the fuel gauge IC's stored discharge curve no longer matches the new cell's actual voltage profile. The gauge predicts 20–30% remaining based on old data, but the cell's open-circuit voltage has already dropped below the point it can sustain load from the CPU and display together — so the system cuts power before the displayed percentage reaches zero. It is not a defective cell; it is an uncalibrated gauge. Force the laptop to hibernate by draining it completely under normal use, then charge to 100% twice in a row without interrupting. The fuel gauge IC re-maps its curve against real discharge data and the early shutdowns stop.