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Battery ASUS Extra Digital NB431823 B21N1818
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Extra Digital NB431823 (B21N1818) is a replacement lithium polymer battery for compatible ASUS laptops. With a nominal capacity of 4150 mAh (32 Wh) and a rated voltage of 7.6 V, this black battery is intended as a direct power source replacement to restore mobile runtime for notebooks that accept the B21N1818 battery model.
This Extra Digital battery uses lithium polymer technology for stable discharge and compact design. It matches the original B21N1818 specifications of 4150 mAh and 7.6 V, providing a straightforward swap-in replacement to recover the laptop’s operating time. The product color is black and it is offered as a single unit suitable for consumer replacement.
Power down the laptop, disconnect the charger and remove the bottom cover following the device manufacturer’s instructions. Carefully disconnect the existing B21N1818 battery connector and remove the old battery. Install the Extra Digital NB431823 in the same orientation, connect the battery cable securely, replace the cover and fasten screws. After reassembly, charge the battery fully before regular use and verify correct operation in the operating system’s battery status utility.
Use only with laptops specified for B21N1818 replacement batteries. Avoid exposure to extreme temperatures, physical damage, or liquid. Dispose of the battery according to local electronic waste regulations and follow manufacturer guidelines for safe charging and storage.
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