Product Overview
The C21N1818-1 is a premium OEM-grade replacement battery that restores dependable 32Wh (4212mAh) of power to your ASUS VivoBook. Built to the verified 7.6V standard specification, it ends random shutdowns, rapid drain and charging failures so your laptop runs as smoothly as the day it was new.
Engineered for a drop-in fit with ASUS VivoBook 14 X412, VivoBook 15 X512 and VivoBook Flip 14 TP412 (TP412UA, TP412FA) series laptops, this battery combines grade-A Li-ion cells with built-in overcharge, over-discharge and short-circuit protection for safe, stable, everyday performance.
Specifications
| Standard Model | C21N1818-1 |
| Battery Type | Li-ion |
| Voltage | 7.6V |
| Capacity | 32Wh / 4212mAh |
| Condition | 100% Brand New Replacement |
| Warranty | 1-Year Warranty |
Replace Part Numbers
This replacement battery is a direct match for the following original part numbers:
- C21N1818-1
- 2ICP7/54/83
Compatible Models
Fits the following ASUS laptop series (always confirm the battery model printed on your original battery before ordering):
- ASUS VivoBook Flip 14 TP412 Series: TP412UA, TP412FA
- ASUS VivoBook 14 X412 Series
- ASUS VivoBook 15 F512 Series: F512DA, F512FA, F512FB, F512FJ, F512FL, F512JA, F512JP, F512UA
- ASUS VivoBook 15 X512 Series: X512DA, X512DK, X512FA, X512FB, X512FJ, X512FL, X512JA, X512JF, X512JP, X512UA, X512UB, X512UF
- ASUS VivoBook 15 R564 Series: R564DA, R564FA, R564JA
- ASUS VivoBook S512 Series: S512DK, S512FA, S512FB, S512FL, S512UA
- ASUS VivoBook A512 Series: A512FA, A512FB, A512FL, A512JA, A512JP, A512UA, A512UF
- ASUS VivoBook K512 Series: K512FA
- ASUS V5000 Series: V5000, V5000F, V5000FA, V5000FB
FAQ
Will the C21N1818-1 battery fit my ASUS VivoBook Flip 14 TP412?
Yes. The C21N1818-1 is the factory-standard battery for ASUS VivoBook Flip 14 TP412UA and TP412FA, and it also serves VivoBook 14 X412 and VivoBook 15 X512 series models that use the same part. For absolute certainty, power off your laptop and check the model number printed on the original battery.
How long will a full charge last with this 32Wh battery?
The 32Wh / 4212mAh capacity is matched to the original specification, so real-world runtimes track the factory battery when new. Grade-A cells keep capacity stable over hundreds of charge cycles.
Is the battery safe and is it covered by a warranty?
Every battery is 100% brand new and passes multi-point safety testing (overcharge, over-discharge, over-temperature and short-circuit protection) before shipping. It is backed by a 1-year warranty and responsive after-sales support.