How do I know if a laptop battery will fit my device?

The most reliable method is matching the part number printed on your original battery. Also confirm the voltage and compare the battery shape/connector position with the product photos and specs.

Where can I find the battery part number?

Shut down the laptop, unplug power, remove the battery (if removable), and read the label printed on the battery itself. That part number is the best way to confirm compatibility.

Are different battery voltages interchangeable?

No. You must match the voltage on your original battery. Note: 10.8V equals 11.1V, and 14.4V equals 14.8V.

What should I compare before ordering a replacement battery online?

Compare the original battery’s part number and voltage first, then verify size/shape, connector type and location, latch position, and orientation against the product photos and specifications.

Can I use my laptop model number instead of the battery part number?

You can use a laptop model number to narrow it down, but the battery part number is more precise. One laptop model can support multiple battery types, so the printed battery part number is best.

What quick settings can extend laptop battery life?

Enable Battery Saver/Power Saver, reduce screen brightness, close unused apps/tabs, turn off Wi-Fi/Bluetooth when not needed, and avoid heat buildup by keeping vents clear.

Asus VivoBook 14 X412FJ Series VivoBook 15 F512FA 15 X512DA Series Asus Y4100FA X412FJ A412FA Series C21N1818 [7.7V / 29Wh] Laptop Battery Replacement

(Bundle with Adapter for 50% Off) C21N1818-2 Battery for Asus VivoBook 14 A412 F412 R424D X412 Asus VivoBook 15 F512 R564 X512 Asus VivoBook S14 S412 Asus VivoBook S14 S412 Asus VivoBook Y4200 Y5200F Series Laptop B21N1818-2 [7.7V] Compatible Battery

$45.50 USD

~~$71.50 USD~~ Sale $45.50 USD

*Price shown is for the Battery only. The AC adapter is offered at a discount when clicking the 'Add to Cart' button.*

Product variants

Product Info

Type Bundle
SKU las350-db-u001
Compatible Brand Asus
Cell Type Conventional Li-polymer
Warranty 1 Year
Shipping Free Shipping

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Description
Specification

Bundle Product – Save More Together!

Buy this battery and get 50% off a compatible laptop adapter when purchased together!!!

After clicking the "Add to Cart" button, a pop-up box will appear, allowing you to add the adapter to your cart with the discount applied automatically.

Don’t miss this deal—bundle and save today!
***Note***
- Bundle discount are exclusive and cannot be combined with bulk discounts on orders.
COMPATIBLE LAPTOP MODELS

Asus VivoBook 14 A412 Series:

Asus VivoBook 14 A412D Series

Asus VivoBook 14 A412DA Series

Asus VivoBook 14 A412DK Series

Asus VivoBook 14 A412F Series

Asus VivoBook 14 A412FA Series

Asus VivoBook 14 A412FL Series

Asus VivoBook 14 A412FJ Series

Asus VivoBook 14 A412U Series

Asus VivoBook 14 A412UA Series

Asus VivoBook 14 F412 Series:

Asus VivoBook 14 F412D Series

Asus VivoBook 14 F412DA Series

Asus VivoBook 14 F412DK Series

Asus VivoBook 14 F412F Series

Asus VivoBook 14 F412FA Series

Asus VivoBook 14 F412FL Series

Asus VivoBook 14 F412FJ Series

Asus VivoBook 14 F412U Series

Asus VivoBook 14 F412UA Series

Asus VivoBook 14 R424 Series:

Asus VivoBook 14 R424D Series

Asus VivoBook 14 R424DA Series

Asus VivoBook 14 R424F Series

Asus VivoBook 14 R424FA Series

Asus VivoBook 14 X412 Series:

Asus VivoBook 14 X412D Series

Asus VivoBook 14 X412DA Series

Asus VivoBook 14 X412DK Series

Asus VivoBook 14 X412F Series

Asus VivoBook 14 X412FA Series

Asus VivoBook 14 X412FJ Series

Asus VivoBook 14 X412FL Series

Asus VivoBook 14 X412U Series

Asus VivoBook 14 X412UA Series

Asus VivoBook 14 X412UB Series

Asus VivoBook 14 X412UF Series

Asus VivoBook 14 X412J Series

Asus VivoBook 14 X412JA Series

Asus VivoBook 15 F512 Series:

Asus VivoBook 15 F512FA Series

Asus VivoBook 15 F512UA Series

Asus VivoBook 15 F512UB Series

Asus VivoBook 15 R564 Series

Asus VivoBook 15 X512 Series:

Asus VivoBook 15 X512DA Series

Asus VivoBook 15 X512DK Series

Asus VivoBook 15 X512FA Series

Asus VivoBook 15 X512FB Series

Asus VivoBook 15 X512FJ Series

Asus VivoBook 15 X512FL Series

Asus VivoBook S14 S412 Series:

Asus VivoBook S14 S412 Series

Asus VivoBook S14 S412F Series

Asus VivoBook S14 S412FA Series

Asus VivoBook S14 S412FJ Series

Asus VivoBook S14 S412FL Series

Asus VivoBook S14 S412D Series

Asus VivoBook S14 S412DA Series

Asus VivoBook S14 S412DK Series

Asus VivoBook S14 S412U Series

Asus VivoBook S14 S412UA Series

Asus VivoBook Y4200 Series

Asus VivoBook Y5200F Series

Asus VivoBook X409 Series:

Asus VivoBook X409BA Series

Asus VivoBook X409DA Series

Asus VivoBook X409DJ Series

Asus VivoBook X409DL Series

Asus VivoBook X409FA Series

Asus VivoBook X509 Series:

Asus VivoBook X509DA Series

Asus VivoBook X509DJ Series

Asus VivoBook X509DL Series

Asus VivoBook X509FA Series

Asus VivoBook X545 Series:

Asus VivoBook X545FA Series

COMPATIBLE ORIGINAL PART NUMBERS

B21N1818-2 | C21N1818-2 | 0B200-03450000

REMARKS
- There are 2 types of batteries for the same laptop model, please check the part number and shape of the battery before placing the order.
Product Type: Replacement Laptop Battery

Condition: New

Cell Type: Conventional Li-polymer

Capacity: 3800mAh / 29Wh

Device Voltage: 7.7V

Product Type:	Replacement Laptop Battery
Condition:	New
Cell Type:	Conventional Li-polymer
Capacity:	3800mAh / 29Wh
Device Voltage:	7.7V

Compatible Brand: Asus

⚡ See More Asus Compatible Laptop Adapters

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(Bundle with Adapter for 50% Off) Dell Latitude D620 D630 D640 Series Laptop Battery PC764 DLD620 PP18L KD491 TC030 PC765 [11.1V] Compatible Battery

From $42.90 USD

~~$68.90 USD~~ From $42.90 USD

Combine Any 5+ Laptop Batteries or Adapters for 10% Off, 10+ for 20% Off!

Bulb Savings: Buy 5+ Packs (6, 8, 10, or 12) for 10% Off; 10+ Packs for 20% Off!

Stock Up And Save Big On Each Category!

(Bundle with Adapter for 50% Off) C21N1818-2 Battery for Asus VivoBook 14 A412 F412 R424D X412 Asus VivoBook 15 F512 R564 X512 Asus VivoBook S14 S412 Asus VivoBook S14 S412 Asus VivoBook Y4200 Y5200F Series Laptop B21N1818-2 [7.7V] Compatible Battery

Product Info

Bundle Product – Save More Together!

Buy this battery and get 50% off a compatible laptop adapter when purchased together!!!

COMPATIBLE LAPTOP MODELS

COMPATIBLE ORIGINAL PART NUMBERS

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Dr.Bulbs 10-Pack A19 8.5W (60W Equivalent) 2700K Warm White Dimmable LED Filament Bulbs

Dr.Bulbs 12-Pack CA10 Flame Tip 5W (40W Equivalent) 2700K Warm White Dimmable LED Filament Candelabra Bulbs

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(Bundle with Adapter for 50% Off) Dell Latitude D620 D630 D640 Series Laptop Battery PC764 DLD620 PP18L KD491 TC030 PC765 [11.1V] Compatible Battery