GreenTechLLC C41N2109 90Whr laptop battery 15.2V 5800mAh 4-cell black

GreenTech C41N2109 90Whr replacement battery

This 15.2V lithium-ion pack delivers 5800mAh across four cells for compatible ASUS ROG laptops. It targets owners of the listed Flow X16, Strix G16, Strix G18, Strix Scar 16, Strix Scar 18 and Zephyrus G16 models who need a fresh power source. The unit is a direct swap for the original C41N2109 and 0B200-04200000 parts. Buyers with other chassis or voltage requirements cannot use this battery.

Capacity and voltage define the practical limits

At 90Whr the pack stores a fixed amount of energy; runtime scales with the notebook's actual draw. The 15.2V nominal output must match the system's charging circuit exactly or the laptop will not recognise the cell. No higher-capacity alternative exists in this form factor, so users needing more hours between charges must rely on external power banks instead.

Black four-cell housing fits the original bay

The rigid casing aligns with the factory screw posts and connector orientation for the supported GV601, G614, G634, G814, G834 and GU604 series. CE, FCC and RoHS markings confirm the safety testing each unit undergoes before shipping. The design adds no bulk beyond the OEM footprint, so the bottom cover closes without gaps. Machines outside the compatibility list will not accept the connector or mounting points.