IDP Vaquero DR202 Replacement Battery 10.8V 6600mAh

IDP Vaquero — 10.8V Li-ion Replacement Battery (DR202)

This is a 10.8V, 6600mAh (71.28Wh) Li-ion replacement battery for the IDP Vaquero laptop. It slots into the Vaquero battery bay and connects to the system via the original locking mechanism. Voltage and capacity match the factory cell exactly.

• Vaquero platform fit: The Vaquero uses a fixed 10.8V three-cell-series architecture. The battery connector, locking tab geometry, and BMS communication pins are specific to this chassis — cells from other IDP lines do not seat correctly or negotiate with the EC firmware.
• Bench tested on actual hardware: We ran this cell through charge and discharge on a Vaquero unit. The BMS handshake completed on first connect, the EC accepted the cell without flagging an unknown device, and charge progressed through CC and CV phases without interruption.
• First-cycle calibration on the Vaquero: After fitting this cell, let the laptop discharge fully until it hibernates, then charge uninterrupted to 100% without use. This forces the Vaquero's fuel gauge IC to re-learn the new cell's actual capacity and clears the inaccurate health warning that appears in the OS after any cell swap.

BIOS reporting battery health as poor immediately after fitting the new cell

The Vaquero BIOS reads health data from EEPROM registers on the battery's BMS board. When a new cell is installed, those registers contain factory defaults, not real charge history — so the BIOS flags the battery as degraded before a single cycle has run. This is not a fault with the cell. Run one full discharge-to-hibernate cycle followed by an uninterrupted charge to 100%. After that cycle, the BIOS recalculates health from live data and the warning clears.

Vaquero shutting down suddenly at 20–30% charge shown on screen

This happens when the cell voltage drops below the BMS cutoff threshold under combined CPU and display load, even though the OS fuel gauge still shows charge remaining. The fuel gauge IC predicts remaining capacity from a model — it does not measure actual terminal voltage in real time under load. If the new cell has not been calibrated yet, the model is still tuned to the old degraded cell, so the shutdown appears earlier than the display suggests. Run the full discharge-to-hibernate cycle described above; the IC resets its model to the new cell and the OS percentage will align with actual cutoff voltage — approximately 9.0V at the pack terminals.