Dell Precision M2800 Replacement Battery 11.1V 8100mAh

Dell Precision M2800 / XPS 15 9530 — 11.1V Li-Polymer Replacement Battery (0H76MY)

This is an 11.1V, 8100mAh (89.91Wh) lithium-polymer replacement battery for the Dell Precision M2800 mobile workstation and several closely related Dell notebook platforms. It replaces OEM part numbers 0H76MY, 245RR, 7D1WJ, H76MV, Y758W, T0TRM, and others listed above. The battery slots directly into the M2800's underside bay and connects via the standard Dell multi-pin smart battery connector.

• Precision M2800, M3800, XPS 15 9530 platform fit: These models share the same 11.1V three-cell Li-Polymer architecture, identical physical footprint, and the same Dell smart battery BMS handshake protocol — which is why one cell services all of them. The BMS communicates charge state and health data over the SMBus interface to the BIOS.
• Bench tested on actual hardware: We cycled this battery on a Precision M2800 unit under CPU and display load. The BMS held charge termination cleanly at 100% and enforced undervoltage cutoff without triggering unexpected shutdown. Cell balancing across all three polymer packs remained within spec throughout the discharge curve.
• Post-install learn cycle on Dell workstations: After fitting this battery, run one full discharge to hibernate cutoff — do not interrupt it — then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on Dell systems.

BIOS reporting battery health as poor immediately after replacement

When you swap the physical cell, the Dell BIOS still holds EEPROM data from the old battery — cycle count, wear level, and rated capacity figures written by the previous cell's fuel gauge IC. The new cell has no matching history, so the BIOS flags it as degraded before it has run a single cycle. This is not a fault with the replacement battery. One full discharge-to-hibernate followed by an uninterrupted charge to 100% gives the BIOS enough data to rewrite its health estimate against the new cell's actual chemistry.

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

This is a voltage cliff issue, not a fuel gauge error. Under combined CPU, GPU, and display load the cell voltage drops faster than the OS fuel gauge can track — the battery hits the BMS undervoltage cutoff threshold while the gauge still reads 20–30%. It happens most often on the M2800 and M3800 when running GPU-intensive workloads. Run two full calibration cycles — discharge to hibernate cutoff, then charge to 100% uninterrupted — so the fuel gauge IC maps the actual voltage curve of the new cell. After calibration, the reported percentage and the real cutoff voltage align more closely.