Description
Specifications
This part number B21N1818 has 4 different versions with different mounting points. Please make sure you original battery match the photos above.
PLEASE NOTE THIS BATTERY IS NOT COMPATIBLE WITH THE C2N1818-1 BATTERY
Voltage 7.7V,
Capacity 3800mAh/29Wh,
Number of Cells/type 2 Cell (Li Poly),
Colour Black
Compatible Part Numbers
- B21N1818
- C21N1818
C21N1818-1 – NOT Compatible
Compatible Devices
- VivoBook 14 A412FA
- VivoBook 14 X412FJ
- >VivoBook 15 F512FA
- VivoBook 15 X512DA
- Y4100FA
Tips to Extend Your Battery’s Lifespan
1. Keep it cool – heat is the biggest cause of battery wear, so avoid leaving your Asus laptop in direct sun, a hot car, or on soft surfaces that block the vents.
2. Avoid charging to 100% every time – many modern laptops have a battery care or conservation mode in their power settings that limits charging to around 80%, which can roughly double your battery’s usable lifespan.
3. Don’t let it run flat – regularly draining the battery to 0% wears it out much faster than topping up before it gets critically low.
4. Store at around 50% charge – if you won’t be using the laptop for a few weeks or more, store it half-charged in a cool, dry place rather than fully charged or fully empty.
5. Go easy on fast charging – rapid chargers generate extra heat, so standard charging (especially overnight or while idle) is gentler on the battery over time.
