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Black rectangular 6-cell lithium-ion laptop battery

FOCUSTEC

FOCUSTEC 8858X 11.1V 60WH 6-cell laptop battery

SKU CH-8CYN-ED300

11.1 V 60 Wh 6-cell lithium-ion replacement battery for Dell Latitude, Inspiron and Vostro laptops

  • Battery TypeLithium-Ion
  • Longer runtime from 60 Wh 6-cell lithium-ion pack
  • Reliable power at 11.1 V for consistent performance
  • Fits Dell Latitude E6420 E6430 E5420 E5520 and Inspiron 14R 15R 17R
  • Built-in overcharge overdischarge over-temperature short-circuit protection
  • Up to 500 recharge cycles for extended service life

Replacement Battery for Latitude and Inspiron

This 11.1V 60Wh lithium-ion pack replaces the original battery in Dell Latitude E5420 E5430 E5520 E5530 E6420 E6430 E6520 E6530 and Inspiron 14R 15R 17R models including 4420 5420 5520 7520 5720 7720. It also fits Vostro 3460 and 3560 systems. The six-cell design restores mobile runtime for users who need a direct replacement without modifications.

Straightforward Swap with Built-In Protection

The battery slides into the existing bay and locks with the original latch mechanism so no tools are required beyond a Phillips screwdriver for the bottom cover. Common issues include forgetting to disconnect the AC adapter before removal or failing to seat the connector fully which prevents the system from recognising the new pack. The unit includes overcharge overdischarge over-temperature and short-circuit protection circuits.

Steady Output Through Extended Sessions

Rated at 60Wh the pack delivers consistent voltage across long work periods rather than only in short bursts. The manufacturer specifies up to 500 recharge cycles over the life of the battery. Protection circuits maintain stable output during sustained loads such as video playback or compile jobs preventing sudden shutdowns caused by voltage sag.

Highlights

  • Longer runtime from 60 Wh 6-cell lithium-ion pack
  • Reliable power at 11.1 V for consistent performance
  • Fits Dell Latitude E6420 E6430 E5420 E5520 and Inspiron 14R 15R 17R
  • Built-in overcharge overdischarge over-temperature short-circuit protection
  • Up to 500 recharge cycles for extended service life

Specifications

Battery TypeLithium-Ion

Questions about this item

How do I confirm the FOCUSTEC 8858X battery is working correctly after installation?

After fitting the battery, power on the laptop and verify the operating system reports 11.1V and 60WH capacity; the charge LED should cycle normally and the pack should sustain up to 500 recharge cycles over its life.

What comes in the box with the 8858X battery and what must I buy separately?

The package contains the 6-cell lithium-ion battery only; no tools, screws, or AC adapter are included, so reuse the original hardware from your Dell Latitude or Inspiron.

Which version of the 8858X battery should I choose for my Dell model?

Match the part number on your old battery — 8858X, T54FJ, M5Y0X, 312-1163, 312-1242 or any listed compatible P/N — to confirm fit for Latitude E6420, E6430, E5420, E5520, Inspiron 14R, 15R, 17R or Vostro 3460, 3560.

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