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Rectangular black lithium-ion laptop battery, model C21N1624

KingSener

KingSener C21N1624 7.7V 39WH laptop battery

SKU CH-ARKD-2WR13 MPN C21N1624

Replacement Li-ion battery rated 7.7 V and 39 Wh for compatible Asus laptops

  • Battery Voltage7.7V
  • Battery Capacity39WH/5070mAh
  • 7V lithium-ion chemistry delivers 39Wh of reliable mobile power
  • 5070mAh capacity supports extended work sessions away from mains power
  • 100% new replacement battery matches original dimensions for tool-free installation
  • Compatible with Asus Q325UA and Q325UAR models for exact fit
  • High-quality cells and PCB ensure stable output without inflated capacity claims

Replacement Battery for Asus Q325 Series

The KingSener C21N1624 is a new 7.7V 39WH lithium-ion battery built for Asus Q325UA and Q325UAR laptops. It uses high-quality cells and a matching PCB to deliver stable capacity and longer running time. The unit matches the original dimensions exactly, so installation requires no adaptation. Buyers who need a higher capacity than 39WH or a different voltage should look elsewhere.

Thermals and Power in Daily Use

The battery operates at a nominal 7.7 volts with a rated capacity of 39 watt-hours or 5070 milliampere-hours. Lithium-ion chemistry provides consistent output without memory effect during normal mobile workloads. No cooling components are present, so the pack adds no audible noise to the system. The supplier states the full charge capacity is not less than the design capacity.

Behaviour Under Sustained Load

During extended sessions the high-quality cells maintain stable voltage delivery for reliable runtime. The manufacturer recommends a conditioning routine of two to three full charge and discharge cycles at low current when the battery is new. For storage, keep the charge above 80 percent and top it up at least once a month. Avoid continuous AC connection while the battery is fitted, and never expose the pack to high heat or humidity.

Highlights

  • 7V lithium-ion chemistry delivers 39Wh of reliable mobile power
  • 5070mAh capacity supports extended work sessions away from mains power
  • 100% new replacement battery matches original dimensions for tool-free installation
  • Compatible with Asus Q325UA and Q325UAR models for exact fit
  • High-quality cells and PCB ensure stable output without inflated capacity claims

Specifications

BrandKingSener
ModelC21N1624
Part NumberC21N1624
0B200-02420000
Battery Voltage7.7V
Battery Capacity39WH/5070mAh

Questions about this item

How do I install the C21N1624 battery and what step do people often skip?

Power off the Asus Q325UA, remove the bottom case screws, disconnect the old battery cable, fit the new 7.7V 39WH pack, reconnect the cable, then fully charge and discharge it two or three times to calibrate the cells.

What maintenance will this 5070mAh Li-ion battery need later?

If stored, recharge above 80% at least once a month; avoid leaving the AC adapter connected continuously while working; keep the pack away from hot or humid environments to preserve capacity.

What limit appears first during sustained heavy use?

The 39WH capacity sets runtime; under continuous load the pack will deplete before any thermal throttle, so plan for a recharge when the charge drops low.

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