Jumper EZbook 3 Pro Compatible Battery 7.6V 4500mAh HW-3487265

Jumper EZbook 3 Pro 13.3 / P313R — 7.6V Li-Polymer Replacement Battery (HW-3487265)

This is a 7.6V, 4500mAh (34.2Wh) lithium-polymer replacement battery for the Jumper EZbook 3 Pro 13.3-inch notebook. It also fits the P313R and WTL-3687265 variants, which share the same battery bay dimensions and connector layout. Capacity figures come from the product data, not third-party listings.

• EZbook 3 Pro / P313R / WTL-3687265 fitment: These three models share an identical 275.10 × 100.00 × 3.90mm cell footprint, the same two-cell 7.6V series configuration, and a compatible BMS connector pinout — which is why one replacement cell covers all three.
• Bench tested on actual hardware: We ran the cell through charge and load cycles on the EZbook 3 Pro platform. The BMS accepted charge from the OEM adapter without error flags, held voltage above the 6.0V cutoff under sustained CPU and display load, and released cleanly at the low-voltage protection threshold.
• Post-installation discharge cycle: After fitting this cell, run one full discharge down to hibernate cutoff, then charge uninterrupted to 100%. The EZbook's BIOS uses a battery learn cycle to calibrate the fuel gauge — skipping this step leaves the health indicator inaccurate and the charge percentage unreliable for the first several sessions.

BIOS reporting poor battery health immediately after swap

The EZbook 3 Pro BIOS reads health status from EEPROM data written by the original cell's fuel gauge IC. When a new cell goes in, that EEPROM record no longer matches the actual chemistry, so the BIOS flags the battery as degraded or unknown — even though the cell is new. Running the full discharge-to-hibernate then uninterrupted charge cycle forces the fuel gauge IC to rewrite calibration data against the replacement cell. After one or two complete cycles, the health reading normalises and the warning clears.

Laptop shuts down at 20–30% charge shown on screen

This is a voltage-cliff failure, not a capacity failure. Under full CPU plus backlit display load, the cell voltage drops faster than the fuel gauge can track — the system hits the hardware undervoltage cutoff while the OS still shows charge remaining. It is most common in the first few cycles before the fuel gauge IC has calibrated against the new cell's actual discharge curve. Run two or three full discharge-to-charge cycles to let the IC build an accurate model. If the shutdown threshold is still triggering above 20%, check that the BIOS charge data has refreshed — the learn cycle resets the discharge curve to the correct 6.0V floor.