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Black rectangular laptop battery with label showing 7.6V 40WH 5000mAh

KingSener

KingSener 9F4FN laptop battery 7.6V 40WH 5000mAh

SKU CH-3Z1X-AXRAZ MPN 9F4FN

A 7.6 V, 40 Wh lithium-ion replacement battery built to match the original Dell Latitude 3420 form factor

  • Battery voltage rating7.6 V
  • Battery capacity40WH/5000 mAh
  • Replaces Dell Latitude 3420 batteries with exact fit
  • 5000 mAh capacity delivers extended runtime per charge
  • 6 V 40 Wh lithium-ion cells supply stable power
  • 100 % new replacement unit with one-year coverage
  • Built-in protection circuits prevent overcharge and short circuits

Replacement battery for Dell Latitude 3420

This KingSener 9F4FN unit is a lithium-ion replacement battery built to match the original specifications for the Dell Latitude 3420 series. It delivers 7.6V and a rated capacity of 40Wh or 5000mAh using Grade A cells and a black housing. The part is 100% brand new and designed to fit without modification.

Suitable for owners of compatible Dell Latitude

It suits users who need a direct swap for a depleted or failing original battery and want the same physical dimensions and connector layout. Buyers who cannot confirm their original battery model number or whose laptop requires a different voltage or form factor should look elsewhere.

7.6V 40Wh capacity rating

The single specification that decides compatibility is the 7.6V voltage combined with the 40Wh/5000mAh capacity, which must match the original battery exactly. The part numbers 9F4FN, 2VKW9 and 2ICP4/79/112 should also correspond to the label on the battery being replaced.

How it compares

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

Price $54.99
Pricier than about 85% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameKingSener
Model name9F4FN
Part number9F4FN 2VKW9 2ICP4/79/112
Power
Battery voltage rating7.6 V
Battery capacity40WH/5000 mAh

Questions about this item

How can I confirm the KingSener 9F4FN is working correctly after installing it in my Dell Latitude 3420?

Fully charge and discharge the battery from low current two or three times. The full charge capacity should reach the 40WH design capacity and the system should report stable runtime without unexpected shutdowns.

What comes in the box with the KingSener 9F4FN and what must I purchase separately?

The package contains the 7.6V 40WH Li-ion replacement battery only. Your existing Dell AC adapter charges the installed battery; no extra cables or tools are included or required for the swap.

Which capacity version of the KingSener 9F4FN should I choose for my Latitude 3420?

This model is offered in a single 40WH 5000mAh configuration at 7.6V. Match the original battery part numbers 9F4FN, 2VKW9 or 2ICP4/79/112 to confirm compatibility before ordering.

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