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Rectangular black lithium-ion laptop battery with connector plug

Beisite

Beisite C21N1618 2ICP7/49/91 7.7V 36Wh laptop battery

SKU CH-E72M-81KE9

A 7.7 V, 36 Wh lithium-ion replacement battery for VivoBook X402, E402, F402 and R417 series laptops

  • Battery typeLithium-Ion
  • Battery voltage rating7.7 V
  • Battery capacity36 Wh
  • Product colorBlack
  • Product typeBattery
  • Compatible withFor VivoBook X402B E402BA F402BA F402B E402BP R417BA X402BP
  • Compatible with VivoBook X402, E402, F402, R417 series
  • Replaces original part numbers C21N1618, 0B200-01400600, 2ICP7/49/91
  • Lithium-ion chemistry delivers 7.7 V and 36 Wh capacity
  • Black finish matches the original laptop battery colour
  • Brand-new condition ensures full rated capacity from first use

Replacement Battery for VivoBook X402

This 7.7V 36Wh lithium-ion pack replaces part numbers C21N1618, 0B200-01400600 and 2ICP7/49/91 in compatible VivoBook X402B, E402BA, F402BA, E402BP, F402BP, L402BA, L402BP, R417BA and R417BP models. It is a direct-fit spare for owners whose original cell no longer holds a useful charge.

Fits Internal Battery Bay Without Extra Hardware

The unit slides into the existing battery compartment and connects to the stock motherboard header, so no adapter cables, BIOS updates or chassis modifications are required. Swapping it restores mobile operation immediately and frees the user from permanent mains tethering.

Upgrades From a Depleted or Failed Original Cell

The jump is worth it when the factory battery drains in minutes, reports service warnings or physically swells. Buyers who need higher capacity than 36Wh or a different voltage should look elsewhere, as this pack matches the original specification exactly.

How it compares

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

Price $45.99
Pricier than about 78% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameC21N1618
Model nameC21N1618
Part number2ICP7/49/91
Product colorBlack
Product typeBattery
Power
Battery typeLithium-Ion
Battery voltage rating7.7 V
Battery capacity36 Wh
Compatibility
Compatible withFor VivoBook X402B E402BA F402BA F402B E402BP R417BA X402BP Series

Questions about this item

How long does the 36Wh capacity last under sustained load before the battery needs recharging?

The 36Wh lithium-ion cell delivers its rated capacity over a full discharge cycle; actual runtime depends on the laptop's power draw and workload.

Does the 7.7V lithium-ion pack run hot or draw extra power during all-day operation?

The battery operates at its nominal 7.7V with standard Li-ion thermal characteristics; heat and power draw follow the host laptop's management.

Which specific VivoBook models must I already own for this C21N1618 battery to fit?

It replaces part numbers C21N1618, 0B200-01400600 and 2ICP7/49/91 in listed VivoBook X402B, E402BA, F402BA, E402BP, R417BA, L402BA and related sub-models.

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