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Rectangular black lithium-ion battery pack with connector ribbon visible

KingSener

KingSener C22N1720 laptop battery 7.7V 6500mAh 50Wh for ASUS ZenBook S UX391 series

SKU CH-576S-7BNYE MPN C22N1720

A 7.7 V, 6500 mAh lithium-ion replacement battery delivering 50 Wh for compatible ASUS ZenBook S UX391 models

  • Battery Voltage7.7V
  • Battery Capacity6500mAh / 50Wh
  • 7V 6500mAh 50Wh capacity delivers extended runtime
  • Brand-new Li-ion cells ensure stable power output
  • 100% compatible with ASUS ZenBook S UX391 series
  • Exact original dimensions allow direct installation without modification
  • No false capacity — full charge meets or exceeds design rating

Direct replacement for ZenBook S UX391

The KingSener C22N1720 is a new lithium-ion laptop battery built for the ASUS ZenBook S UX391 series including UX391FA, UX391UA and related sub-models. It restores mobile power for owners whose original pack no longer holds a useful charge.

Black Li-ion pack with original footprint

The battery uses high-quality cells and a matched PCB in a black housing that mirrors the factory dimensions, so it fits the existing bay without modification. A 7.7 V nominal voltage and 6500 mAh capacity deliver 50 Wh of energy for extended unplugged sessions.

6500 mAh capacity decides runtime

This single figure determines how long the ultrabook runs away from mains power; buyers needing significantly more endurance should look elsewhere. The 80 % storage charge guideline and full charge-discharge cycling advice support long-term cell health.

Highlights

  • 7V 6500mAh 50Wh capacity delivers extended runtime
  • Brand-new Li-ion cells ensure stable power output
  • 100% compatible with ASUS ZenBook S UX391 series
  • Exact original dimensions allow direct installation without modification
  • No false capacity — full charge meets or exceeds design rating

Specifications

BrandKingSener
ModelC22N1720
Part NumberC22N1720
Battery Voltage7.7V
Battery Capacity6500mAh / 50Wh

Questions about this item

What voltage does the C22N1720 battery operate at?

The KingSener C22N1720 runs at 7.7V, matching the original specification for the ASUS ZenBook S UX391 series.

Will this 50Wh battery fit inside my UX391FA without modification?

Yes, it is built to the same physical dimensions as the factory unit, so it slots into the existing battery bay with no case changes.

How do I install the replacement battery and what step is often missed?

Power off the laptop, open the bottom cover, disconnect the old pack, connect the new C22N1720, then fully charge and discharge it two or three times to calibrate the fuel gauge.

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