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Black rectangular lithium-ion laptop battery with label showing model C21N1701 7.7V 39Wh

KingSener

KingSener C21N1701 laptop battery 7.7V 39Wh

SKU CH-YH3E-V5SHP MPN C21N1701

Replacement lithium-ion battery delivering 7.7 V and 39 Wh for compatible ASUS VivoBook models

  • Battery typeLithium-Ion
  • Battery voltage rating7.7 V
  • Product colorBlack
  • Product typeBattery
  • Compatible with39WH
  • 39Wh capacity powers your Asus VivoBook through a full workday
  • 7V lithium-ion cells deliver stable voltage for reliable performance
  • Direct replacement for part numbers C21N1701, C21PQC5 and 0B200-02640000
  • Fits S406UA, K406UA, S460UA and related VivoBook 14 models
  • Brand-new replacement battery with black finish matches original look

Direct replacement for select VivoBook S14 models

This 7.7 V lithium-ion pack supplies 39 Wh of capacity and fits the Asus VivoBook S406UA, S406U, K406UA and the S406UA-BM360T, S406UA-BM146T and S406UA-BM148T variants. It replaces the original C21N1701, C21PQC5 and 0B200-02640000 part numbers. The cell is manufactured in China and ships brand new in black.

Verify the exact model label on your current battery

Check that the sticker on your existing pack reads C21N1701 or one of the listed replacement part numbers before ordering. Confirm the voltage printed on the original is 7.7 V and that the laptop series matches the compatible VivoBook S14 models shown above. A mismatch in part number or voltage will prevent correct installation.

Steady output throughout the discharge cycle

The lithium-ion chemistry delivers a stable 7.7 V across the usable capacity range rather than a brief peak followed by rapid sag. This behaviour supports consistent run-time during extended work sessions without sudden shutdowns caused by voltage collapse under sustained load.

How it compares

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

Price $43.99
Pricier than about 76% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameKingsener
Model nameC21N1701
Part numberC21N1701
Product colorBlack
Product typeBattery
Power
Battery typeLithium-Ion
Battery voltage rating7.7 V
Compatibility
Compatible with39WH

Questions about this item

What comes with the KingSener C21N1701 battery and what must I buy separately?

The package contains the C21N1701 lithium-ion battery only; no tools, screws or AC adapter are included.

Which capacity version of the C21N1701 should I choose for my Asus VivoBook S406UA?

This model is the 39 Wh / 7.7 V version, matching the original C21N1701 and 0B200-02640000 part numbers.

What does the 39 Wh rating mean for daily runtime in a VivoBook S406UA?

It stores 39 watt-hours of energy, giving a typical full charge for the S406UA series under normal mixed use.

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