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Rectangular black laptop battery with label showing 40Wh 14.8V

PISKEKAT

PISKEKAT 40Wh 14.8V Li-Ion Battery XCMRD MR90Y P28F

SKU CH-NXAX-MFW3N

Replacement 40Wh 14.8V Li-ion battery with over 500 recharge cycles for Dell Inspiron and Latitude laptops

  • TypeOther
  • 40 Wh capacity keeps your laptop running longer
  • 8 V output matches original Dell specifications
  • Over 500 recharge cycles extend usable lifespan
  • UL safety testing confirms reliable operation
  • Compatible with Inspiron 13, 14, 15 and 17 inch models

40 Wh 14.8 V Li-Ion replacement battery

This new 40 Wh lithium-ion battery operates at 14.8 V and is built to fit a wide range of Dell Inspiron and Latitude notebooks. It targets owners of compatible 13, 14, 15 and 17 inch models who need a direct replacement for the original XCMRD or MR90Y pack. The cell chemistry is standard rechargeable Li-Ion.

Fits XCMRD MR90Y P28F part numbers

The pack replaces Dell part numbers FW1MN, MK1R0, PVJ7, 312-1387, 312-1390 and 312-1392. It slots into the existing battery bay without adapters, freeing the user from a tethered power brick. Buyers whose laptops require a different voltage, capacity or physical form factor cannot use this unit.

500-plus recharge cycles with UL safety testing

Rated for more than 500 full recharge cycles, the battery is designed to maintain usable capacity over extended daily use. It has passed UL safety testing to meet recognised standards for thermal and electrical protection. Sustained heavy loads will still reduce runtime per charge as with any Li-Ion cell.

Highlights

  • 40 Wh capacity keeps your laptop running longer
  • 8 V output matches original Dell specifications
  • Over 500 recharge cycles extend usable lifespan
  • UL safety testing confirms reliable operation
  • Compatible with Inspiron 13, 14, 15 and 17 inch models

Specifications

TypeOther

Questions about this item

How long does the 40 Wh capacity last before the battery needs recharging under sustained use?

The 40 Wh rating defines the total energy stored; actual run-time depends on the laptop model and workload, so the capacity itself is the first limit you will reach.

Does the 14.8 V Li-ion pack generate noticeable heat or noise during all-day operation?

The battery is a passive component with no moving parts, so it produces no audible noise and only normal warmth during charge or discharge cycles.

Which Dell laptop models must I already own for this XCMRD MR90Y P28F battery to work?

It fits Dell Inspiron 14 3421, 3437, 5421, 5437, 15 3521, 3531, 3541, 3542, 3543, 3570, 17 3721, 5721, 5737, 5748 and Latitude 3440, 3540 among others listed.

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