We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black rectangular laptop battery with three cells, 11.4V 3684mAh 42Wh

Battery Technology Inc.

Battery Technology Inc. JPFMR-BTI laptop battery 3-cell 11.4V 3684mAh 42Wh

SKU CH-FBNM-D25DN

A 3-cell lithium-ion notebook battery delivering 11.4 V, 3684 mAh and 42 Wh for compatible Dell systems

  • Battery type3 Cell Lithium-Ion
  • Battery voltage rating11.4 V
  • Battery capacity3,684 mAh
  • Product colorBlack
  • Product typeBattery
  • Key featuresWatt hour: 42 Wh
  • 3-cell lithium-ion design keeps weight low
  • 42 Wh capacity powers extended work sessions
  • 4 V output matches original Dell specification
  • 3684 mAh rating delivers reliable runtime
  • New condition ensures full performance from day one

What this battery replaces

The BTI JPFMR-BTI is a 3 cell lithium-ion laptop battery rated at 11.4V and 3684 mAh. It delivers 42 Wh of energy for compatible Dell notebooks. The pack is finished in black and was first listed by the manufacturer in 2024. It suits owners who need a direct replacement for the original pack.

Installation notes

The battery fits into the standard Dell notebook bay and connects with the factory connector. No tools beyond a small screwdriver are usually required. The most common issue is forgetting to fully seat the latch, which leaves the pack loose and prevents charging. A second issue is installing the pack while the AC adapter is still attached; always disconnect power first.

Capacity that decides fit

The decisive figure is the 42 Wh rating combined with the 11.4V output. If the original Dell battery shows a different watt-hour value or voltage, this pack will not report the correct charge level and may not charge at all. Match both numbers exactly before ordering.

How it compares

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

Price $75.99
Pricier than about 90% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameBTI
Model nameJPFMR-BTI
Product colorBlack
Product typeBattery
Power
Battery type3 Cell Lithium-Ion
Battery voltage rating11.4 V
Battery capacity3,684 mAh
Size & build
Shipping weight0.22 kg
Package size227 × 136 × 24 mm

Questions about this item

How can I confirm the 11.4V 3-cell battery is working after installation?

Check the operating system battery report for a design capacity near 42 Wh and verify the reported voltage reads 11.4 V when fully charged.

What comes in the box with the BTI JPFMR-BTI and what must I buy separately?

The package contains the 3-cell lithium-ion battery only; no tools, screws or AC adapter are included.

Which capacity version of the JPFMR-BTI should I choose for my Dell notebook?

This model is offered in a single 3684 mAh 42 Wh configuration; choose it when your original battery matches 11.4 V and three cells.

More in Laptop Chargers & Batteries

Similar items