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Rectangular black Dell laptop battery with six cells

DELL

DELL YFDF9 65Wh 6-cell 5800mAh laptop battery

SKU CH-CBYB-1C8N5 MPN YFDF9

A 65 Wh, 11.1 V lithium-ion pack with six cells and 5800 mAh capacity for Dell Latitude 3340 and 3350 notebooks

  • Battery type6 Cell
  • Battery voltage rating11.1 V
  • Battery capacity5,800 mAh
  • Product typeLaptop-computer-batteries
  • Higher capacity extends runtime on Latitude 3340 and 3350
  • 65 Wh energy rating supports longer unplugged sessions
  • 5800 mAh at 11.1 V delivers consistent power
  • Six-cell lithium-ion design balances weight and endurance
  • Genuine Dell OEM part ensures correct fit and charging

Replacement for Latitude 3340 and 3350

This genuine DELL OEM lithium-ion battery fits the Latitude 3340 and Latitude 3350 notebooks. It carries part number YFDF9 and replaces Dell part numbers 3NG29, H2F7D, HGJW8 and K5NN2. The pack uses six cells rated at 11.1V and 5800mAh for 65Wh of energy. Buyers needing a different form factor or voltage should look elsewhere.

Six-cell pack holds 65Wh through a workday

The 65Wh rating comes from the 5800mAh capacity at 11.1V across six lithium-ion cells. That capacity is the higher option Dell offers for these models, so runtime scales with the larger cell count rather than a short burst rating. Sustained output stays steady while the pack discharges through typical office workloads. Heavy continuous loads will drain the charge faster than light use.

Direct fit with no extra hardware

The battery slides into the standard bay on the Latitude 3340 and 3350 without adapters or cables. Alignment tabs match the original chassis, so installation is a single-step swap. The most common issue is forgetting to release the locking latch before pulling the old pack, which can bend the plastic tab. A second issue appears when the BIOS does not recognise the new pack until a full charge cycle completes.

How it compares

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

Price $70.99
Pricier than about 90% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameDELL
Product typeLaptop-computer-batteries
Power
Battery type6 Cell
Battery voltage rating11.1 V
Battery capacity5,800 mAh
Size & build
Shipping weight0.59 kg
Package size254 × 102 × 51 mm

Questions about this item

Does the 11.1V 65Wh battery run hot or draw extra power during all-day use?

The 11.1V 65Wh lithium-ion pack is designed to the same thermal and power profile as the original Dell module, so it stays within normal operating temperatures and does not increase system power draw.

Which laptop models must I already own for the YFDF9 to fit and function?

This battery is compatible only with Dell Latitude 3340 and Latitude 3350 notebooks; it will not fit other Dell models or third-party laptops.

Will the 5800mAh 6-cell pack work alongside the original AC adapter and charging circuitry in a Latitude 3340?

Yes — the YFDF9 uses the same 11.1V 6-cell chemistry and Dell part numbers (3NG29, H2F7D, HGJW8, K5NN2), so the existing charger and firmware recognise it without any changes.

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