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Rectangular black lithium-ion battery pack with label showing 11.4V 4080mAh

Total Micro Technologies

Total Micro Technologies T7B32AA-TM 3-Cell 4080 mAh 11.4 V laptop battery

SKU CH-9YB4-X8E69 MPN T7B32AA-TM

A 3-cell 4080 mAh 11.4 V lithium-ion replacement battery compatible with HP EliteBook 745, 755, 840 and 850 G3 and G4 models

  • Battery typeLithium-Ion
  • Ready to power compatible HP EliteBook notebooks
  • 4080 mAh capacity supports extended mobile use
  • 4 V DC output matches original specifications
  • Lithium-Ion chemistry enables rechargeable operation
  • 1-year limited warranty included with purchase

Direct HP EliteBook replacement

This 3-cell lithium-ion battery is built for HP EliteBook 745 G3, 755 G3, 840 G3, 850 G3, 745 G4, 755 G4, 840 G4 and 850 G4 notebooks. It restores original runtime for mobile professionals who need reliable power away from a desk.

Proprietary form factor fits the original bay

The pack uses the exact proprietary dimensions required by the listed EliteBook models, so it seats securely without adapters or modifications. Rechargeable lithium-ion chemistry supports daily charge cycles and maintains capacity over extended use.

4080 mAh at 11.4 V delivers consistent output

The 4080 mAh rating provides stable 11.4 V DC power for typical office workloads and light multitasking. Normal operation stays within thermal limits for the cell configuration, and the pack draws only the current the notebook requests.

How it compares

Measured against everything we stock in Laptop Chargers & Batteries, at today’s prices. Recalculated every night.

Price $65.99
Pricier than about 90% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameTotal Micro
Power
Battery typeLithium-Ion
Size & build
Shipping weight0.45 kg
Package size229 × 140 × 64 mm

Questions about this item

What voltage does the 11.4 V lithium-ion battery deliver to the notebook?

The pack provides a steady 11.4 V DC output that matches the original power requirement of the supported EliteBook models.

Will the 3-inch by 6-inch by 9-inch pack fit inside an HP EliteBook 840 G4?

Yes, the proprietary dimensions are designed to slide into the battery bay of the 840 G4 and the other listed EliteBook G3 and G4 chassis.

How is the battery installed and what step do people often miss?

Power off the notebook, unlatch the release, insert the pack until it clicks, then charge fully before first use to calibrate the fuel gauge.

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