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Rectangular black lithium-ion laptop battery with connector pins

E-buy

E-buy 11.52V 42Wh B31N1902 3ICP5/57/80 laptop battery

SKU CH-35PS-49NAH

A new 11.52 V, 42 Wh lithium-ion replacement battery for compatible laptops

  • Product typeBattery
  • 52V 42Wh capacity delivers extended laptop runtime
  • Li-ion chemistry ensures reliable power for daily use
  • Replaces B31N1902 and 3ICP5/57/80 part numbers directly
  • 3653mAh rating supports consistent performance across sessions
  • New condition guarantees full capacity out of the box

Direct replacement battery

The E-buy 11.52V 42Wh unit replaces part numbers B31N1902 and 3ICP5/57/80 in compatible laptops. It uses lithium-ion chemistry and ships new with a black housing. The 3653mAh capacity restores original run-time for supported models.

Thermals and power behaviour

Lithium-ion cells operate within normal laptop thermal limits during typical workloads. The 11.52V output matches the original specification so power draw remains consistent with the factory design. No additional cooling or noise is introduced by the battery itself.

Upgrade context and fit

This battery suits owners of laptops that require the B31N1902 or 3ICP5/57/80 part numbers. It is not for users needing a different voltage, capacity or form factor. The jump is worth it when the original pack no longer holds sufficient charge.

How it compares

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

Price $41.99
Pricier than about 73% of the 27,790 comparable items (median $30.99).

Specifications

Product
Product typeBattery

Questions about this item

How do I install the B31N1902 battery and which step is often missed?

Power off the laptop, unplug the AC adapter, remove the old pack, align the B31N1902 connector with the motherboard header, press firmly until it clicks, then secure the screws before turning the machine on.

What maintenance or replacement will the 3ICP5/57/80 battery need later?

The Li-ion 3653mAh cell gradually loses capacity; after several hundred cycles it will hold less charge and should be replaced when run time becomes too short.

What limit appears first on the 11.52V 42Wh pack during sustained use?

The 42Wh capacity sets the maximum run time; under continuous load the voltage will drop to the cutoff threshold and the laptop will shut down.

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