Total Micro Technologies GRT01-TM 4-Cell 64Whr 15.2V laptop battery

Replacement battery for Dell Latitude and Precision

The Total Micro Technologies GRT01-TM is a 4-cell 64 WHr lithium-ion pack rated at 15.2 V. It is built as a direct replacement for Dell Latitude 5421, 5431, 5521, 5531 and Precision 3470, 3561, 3571 models. The black housing matches the original form factor for straightforward installation. Buyers needing a higher-capacity pack or a different voltage will not be served by this unit.

Sustained discharge at rated capacity

The 64 WHr rating reflects energy available over a typical discharge cycle rather than a brief peak. Four cells share the load, which helps keep voltage stable during extended use such as long meetings or travel. Runtime scales with the notebook's power draw, so heavier workloads reduce operating time proportionally. The pack contains no circuitry to boost output beyond its 15.2 V nominal level.

Limits of the 15.2 V 4-cell design

A 15.2 V nominal voltage fixes the energy ceiling at 64 WHr for this cell count and chemistry. The battery cannot deliver more watt-hours without adding cells or changing chemistry, which would alter the form factor. Dell's charging firmware expects this exact voltage window, so the pack will not negotiate higher voltages or faster charge rates. Compatibility is limited to the listed Latitude and Precision models.