Description
The Asus X551 / X451 Replacement Laptop Battery—most commonly cross-referenced by the official factory part numbers A41N1308 and A31N1319—is an internal, screw-in power pack built for budget Asus laptops. Suppliers track this part number under general warehouse inventory SKUs such as BATTX551 or BAT-ASX551-OEM. It features a unique, long cylindrical bar layout configured to align beneath the interior chassis palm rest.
(ULTRA CELL BRAND)
Essential Features Summary:
| Feature Category |
Core Technical Data Point |
| Model & SKU Identifiers |
Primary Warehouse SKU: BATTX551 | Asus Part Numbers: A41N1308, A31N1319, 0B110-00250000 |
| Cell Composition |
Lithium-Ion (Li-Ion) | 4-Cell internal inline cylindrical alignment |
| Charge Capacity |
37 Wh / Roughly 2200 mAh to 2600 mAh (Based on cell classification) |
| Voltage Output |
14.4V to 14.8V (Fully synchronized across original motherboard rails) |
| Safety Integration |
Built-in circuit defenses shielding against short-circuits, voltage surges, and overcharging |
| Useful Lifespan |
Rated for up to 300 to 500 complete discharge/charge cycles |
| Physical Configuration |
Slim, internal elongated tubular form factor with fixed snap-in lock rails |
| Hardware Fit Ecosystem |
Asus X Series: X551, X551C, X551CA, X551M, X551MA, X551MAV
Asus X451 Series: X451, X451C, X451CA, X451MA
Alternative Sub-Models: D550, D550M, D550MA, R512M |
