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Black rectangular 6-cell lithium-ion laptop battery

65WH MR90Y 11.1V 6-cell Li-ion Battery for Dell Inspiron 3521 5521 5721

SKU CH-ESJV-1XR1M

65WH 11.1V 6-cell Li-ion replacement battery compatible with Dell Inspiron 14, 15 and 17 series laptops

  • Battery type96 W
  • Battery voltage rating20 V
  • Power adapter voltage20 V
  • Power adapter wattage85 W
  • Product colorBlack
  • Product typeCharger
  • 65 Wh capacity powers Dell Inspiron models for extended use
  • 1 V 6-cell lithium-ion design matches original voltage requirements
  • Compatible with Inspiron 14 3421 15 3521 17 5721 series
  • Replaces Dell part numbers MR90Y 0MF69 XCMRD and others
  • Grade A cells with built-in circuit protection for safe operation

65WH Li-ion Battery for Dell Inspiron

This 65 watt-hour lithium-ion battery uses six cells at 11.1 volts to power compatible Dell Inspiron laptops. It replaces the original MR90Y pack and matches the listed part numbers including 0MF69, N121Y and VR7HM. The unit is built with Grade A cells for reliable charge cycles.

Black 6-cell Pack with Circuit Protection

The black enclosure houses six cells and integrated circuit protection that guards against overcharge, over-discharge and short circuits. The design fits the battery bay of Inspiron 14, 15 and 17 models such as the 3421, 3521, 5521 and 5721 series without modification. Weighing 12 ounces, it slots in using the original latch mechanism.

Steady Output for Daily Workloads

The 11.1 volt output delivers consistent power for typical office tasks, web browsing and media playback. Internal protection circuitry limits heat build-up during charging and discharging, keeping the pack within safe thermal limits. No active cooling is required, so the laptop runs silently on battery power.

How it compares

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

Price $34.99
Pricier than about 62% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameDELL
Model nameMR90Y
Part numberMR90Y
Product colorBlack
Product typeCharger
Power
Battery type96 W
Battery voltage rating20 V
Power adapter voltage20 V
Power adapter wattage85 W
Size & build
Product weight12 oz
Compatibility
Compatible withMR90Y

Questions about this item

Does the 11.1 V, 65 Wh rating cap usable capacity at 65 Wh?

The 11.1 V, 65 Wh specification defines the total energy the pack can deliver; actual runtime varies with the laptop's power draw.

Will the 6-cell, 12-ounce pack fit the Dell Inspiron 15 3521 battery bay?

The battery is built to the original Dell MR90Y form factor, so it seats in the same bay on Inspiron 15 3521, 5521 and 5721 models.

What is the correct installation step for the MR90Y, and what mistake should I avoid?

Power off the laptop, slide the release latch, remove the old pack, insert the MR90Y until it clicks, then charge fully before first use; do not force the connector.

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