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 lithium-ion laptop battery, new condition

Beisite

Beisite BTY-M4B 11.55V 45.63Wh laptop battery

SKU CH-HGDD-61GH6

11.55 V 45.63 Wh lithium-ion replacement battery fits MSI models using BTY-M4B or 3ICP5/78/66 part numbers

  • Battery typeLithium-Ion
  • Product colorBlack
  • Product typeBattery
  • Replaces BTY-M4B and 3ICP5/78/66 part numbers
  • Fits MSI laptops requiring the BTY-M4B battery
  • Lithium-ion chemistry delivers 11.55V operating voltage
  • 63Wh capacity supports extended portable use
  • 3950mAh rating provides reliable charge storage

Compatible MSI replacement battery

The Beisite BTY-M4B is a new lithium-ion battery built to replace part numbers BTY-M4B and 3ICP5/78/66 in supported MSI laptops. It delivers 11.55V and 45.63Wh of capacity with a 3950mAh rating. The black housing matches the original aesthetic.

Suits owners needing a direct swap

This unit fits MSI models that specify the BTY-M4B or 3ICP5/78/66 part number. Buyers whose laptops require a different voltage, connector layout or capacity should look elsewhere. The supplier notes the compatibility list is non-exhaustive and advises confirming the original part number before purchase.

Single battery in the package

The box contains one battery only, with no tools, screws or installation guides included. Users must supply their own opening tools and follow the laptop manufacturer’s service instructions. No software or driver installation is required for the hardware to function.

How it compares

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

Price $47.99
Pricier than about 80% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameBTY-M4B
Model nameBTY-M4B
Product colorBlack
Product typeBattery
Power
Battery typeLithium-Ion

Questions about this item

My MSI laptop originally used part number BTY-M4B or 3ICP5/78/66 — will this battery fit without any adapter?

Yes, the BTY-M4B is listed as a direct replacement for those part numbers, so it installs in the original battery bay without an extra adapter.

I plan to keep my existing 11.55 V power brick — is the voltage match exact?

The battery is rated at 11.55 V, matching the original specification, so your current charger will communicate and charge normally.

After fitting the battery, how can I confirm the 45.63 Wh capacity is being reported?

In Windows, open the battery report or BIOS; both should show a design capacity of 45.63 Wh and a full-charge capacity close to that value.

More in Laptop Chargers & Batteries

Similar items