Description
Product Overview
This is a genuine replacement Asus C21N1818 37Wh laptop battery. It is a brand new product with 1-year warranty, shipped within one business day with free shipping. Enjoy 30-day hassle-free returns.
Specifications
- Part Number: C21N1818
- Capacity: 37Wh
- Voltage: 15.4V
- Chemistry: Li-ion
- Condition: Brand New
Compatible Part Numbers (P/N)
This battery directly replaces Asus part numbers: C21N1818 and 0B200-03280500, 0B200-03280600, 0B200-03280700.
Compatible Models
This battery is compatible with these Asus laptop models:
- Asus Business P1 Series: P1511CEA, P1511CJA
- Asus Business P1411CEA, P1411CJA
- Asus ExpertBook P1 Series: P1511CDA, P1511CEA
- Asus Education Series: M415DA, M515UA
- Asus VivoBook 14 Series: A412DK, D415DA, F412DA, F412DK, F412FA, F412FJ, F412FL, F412UA, F412UB, F412UF, F415EA, F415JA, R456EA, R465JA, X412DA, X412DK, X412FA, X412FJ, X412FL, X412UA, X412UB, X412UF, X415, X415DA, X415JA, X415JF, X415JP, X415MA
- Asus VivoBook 15 Series: D515DA, D515UA, F515EA, F515JA, F515KA, F515MA, M515DA, R565JA, X515EA, X515EP, X515JA, X515JF, X515JP, X515KA, X515MA, X515UA
- Asus VivoBook R424DK
- Asus X415FA, X515FA
- Asus ZenBook Series: F415EA, F415EP, X415EA, X415EP, X415KA
Need Help Finding Your Model?
We’ve listed many compatible models above, but there are even more that work with this battery. If you don’t see your specific model listed, please leave your laptop model number or current battery part number in the order notes during checkout. We’ll verify compatibility before shipping.
When Should You Replace Your Battery?
Here are common signs that indicate it’s time for a battery replacement:
| Symptom | Description |
|---|---|
| Short Runtime | Battery drains quickly, lasting less than 1 hour on full charge |
| Swelling/Bulging | Battery case appears swollen or distorted |
| Not Charging | Battery won’t charge despite using correct charger |
| Overheating | Battery gets unusually hot during use or charging |
| System Errors | Laptop shows “battery not detected” or similar warnings |
| Age | Battery is 2+ years old with noticeable performance decline |
Estimated Battery Life
Based on the 37Wh capacity, here are conservative estimates for different usage scenarios:
| Usage Scenario | Estimated Runtime |
|---|---|
| Web Browsing | 3-4 hours |
| Document Editing | 4-5 hours |
| Video Playback | 2-3 hours |
| Gaming | 1-2 hours |
| Standby/Sleep | 8-12 hours |
Note: These are conservative estimates for a new battery used with older hardware. Actual runtime may be shorter than when your laptop was new due to increased software demands and general hardware aging.
Shipping & Warranty
- ✓ Shipped within 1 business day
- ✓ 30-day money back guarantee
- ✓ 1-year manufacturer warranty
- ✓ Free shipping
- ✓ Brand new product
- ✓ In stock ready to ship
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