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Black rectangular 9 cell lithium ion laptop battery

Battery Technology Inc.

Battery Technology Inc. DL-D620X9-26 9 Cell 11.1V 7800mAh laptop battery

SKU CH-V851-E4ZA9 MPN DL-D620X9-26

Nine-cell lithium-ion laptop battery delivering 11.1V and 7800mAh capacity for extended runtime

  • Battery type9 Cell Lithium-Ion
  • Battery voltage rating11.1 V
  • Battery capacity7,800 mAh
  • Product typeBattery
  • Key featuresColor: BLACK
  • Longer runtime between charges thanks to 7800mAh capacity
  • 9-cell lithium-ion design delivers extended usage time
  • 1V output matches original laptop specifications
  • Black colour blends with most notebook chassis
  • New condition ensures full rated performance from day one

Replacement 9-Cell Lithium-Ion Battery

This 9-cell lithium-ion unit restores portable power to compatible notebooks. It suits owners of matching Dell Latitude models who need a direct-replacement cell pack. The black housing matches the original chassis colour. Condition is new and ready for immediate installation.

Thermal and Power Behaviour

Lithium-ion chemistry delivers steady 11.1V output across the discharge curve. The pack runs cool during typical office workloads and produces no audible noise. Rated capacity of 7800mAh supports extended unplugged sessions. No active cooling or external power circuitry is required beyond the notebook’s own charging system.

Build Integration

The battery slots into the existing bay without adapters or cable routing. It frees the user from tethered outlet hunting during travel or meetings. Compatibility is limited to systems designed for the DL-D620X9-26 form factor and voltage. Buyers needing a different cell count, voltage or connector layout should verify their service manual before ordering.

How it compares

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

Price $98.99
Pricier than about 90% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameBTI
Model nameDL-D620 × 9-26
Product typeBattery
Power
Battery type9 Cell Lithium-Ion
Battery voltage rating11.1 V
Battery capacity7,800 mAh
Size & build
Shipping weight1.36 kg
Package size234 × 147 × 74 mm

Questions about this item

How do I install the 9-cell 11.1V battery and which step is often missed?

Power off the laptop, disconnect the AC adapter, slide the release latch, insert the pack until it clicks, then reconnect power and let the system recognise the 7800mAh capacity before use

What maintenance will the 9-cell lithium-ion pack need over its life?

Calibrate every few months by running a full charge–discharge cycle, keep the contacts free of dust, and store at moderate temperature when the notebook is not used for long periods

What limit appears first during sustained heavy load on this 7800mAh pack?

The 11.1V output will sag as the cells approach their low-voltage threshold, triggering the notebook’s protection circuit to shut down to preserve the 9-cell chemistry

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