Chicony 1500 DR36 Replacement Battery 12V 3800mAh

Chicony 1500 — 12V Ni-MH Replacement Battery (DR36)

This is a 12V, 3800mAh Ni-MH replacement battery for the Chicony 1500 notebook. It carries OEM part numbers DR36 and DR36S. The cell fits directly into the original battery bay and restores the laptop's ability to run away from mains power.

• Chicony 1500 platform fit: The DR36 and DR36S share the same 12V rail, physical housing, and connector pinout across the 1500 series. Both OEM part numbers refer to this same cell configuration, so either applies here.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the Chicony 1500 platform. The BMS accepted the cell without fault codes, and charge termination triggered correctly at full capacity without overrun.
• First-cycle calibration on the Chicony 1500: After installing this cell, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after swapping cells on this notebook.

BIOS reporting poor battery health after installing the DR36

When the Chicony 1500 BIOS reads a new cell, it compares live data against EEPROM values written by the original battery. A fresh cell has no matching history, so the BIOS flags health as poor or unknown immediately after install. This is a data mismatch, not a fault with the replacement cell. Running one full discharge-to-hibernate then a complete uninterrupted charge gives the firmware enough data to rewrite its learned profile. After two to three full cycles, the health report normalises.

Laptop shuts down with 20–30% charge still showing on screen

This happens because the fuel gauge IC is still calibrated to the old, degraded cell. The percentage reading is based on outdated capacity data, so the displayed figure no longer maps accurately to actual cell voltage. When the new cell's voltage drops under full CPU and display load, the system hits a hard cutoff before the gauge reaches zero. To correct this, run two or three full discharge-to-hibernate and full-recharge cycles — the fuel gauge IC will recalibrate to the new cell's actual capacity curve, and the cutoff point will shift to below 5%.