B21N1818-3 Replacement Battery for Asus VivoBook A409 / D409 / F409 / M409 / X409 in Bangladesh
Is the battery on your Asus VivoBook A409 / D409 / F409 / M409 / X409 draining fast, refusing to charge, or shutting down without warning? This brand-new B21N1818-3 replacement battery restores dependable, all-day backup – available in Bangladesh from LaptopVai at a clear price.
Fits these models
- Asus VivoBook A409 / D409 / F409 / M409 / X409
- A509 / D509 / F509 / M509 / X509
- X415 / F415 / M415
- X515 / F515 / D515 / S515 / A515 / R565
- X545 / F545
Key features
- Brand-new Li-ion cells engineered for stable, long-lasting backup
- Matched to the original 7.7V / 37Wh / 4730mAh specification for a true factory fit
- Built-in overcharge, over-discharge, overheat & short-circuit protection
- 12-month warranty, tested before dispatch
Specifications
| Part number | B21N1818-3 |
|---|---|
| Battery type | Li-ion |
| Voltage | 7.7V |
| Capacity | 37Wh / 4730mAh |
| Cell configuration | 2 Cell |
| Condition | Brand New |
| Warranty | 12 Months |
Compatible part numbers: B21N1818-3, C21N1818-3
Installation & replacement
Browse all laptop batteries or more Asus laptop parts at LaptopVai. Prefer professional fitting? Use our laptop battery replacement service in Dhaka – bring your laptop to our Elephant Road shop and we will install and test it for you.
Price & availability
Current price: 2,600.00৳ – in stock. Cash on delivery nationwide, or collect from our Elephant Road (New Market) shop in Dhaka.
Frequently asked questions
What is the capacity of this battery?
37Wh / 4730mAh, 7.7V, 2 Cell – matched to the original specification.
Do you deliver nationwide with cash on delivery?
Yes – we deliver across Bangladesh with cash on delivery, or collect from our Elephant Road (New Market) shop in Dhaka.
Can you install the battery for me?
Yes – bring your laptop to our Elephant Road shop and we will fit and test it for you.
2-source-verified spec; ‘-3’ shape variant of the B21N1818 family (7.7V 37Wh) — NOT interchangeable with plain B21N1818 / -1 / -2. Confirm shape before ordering.
Asus B21N1818-3 ল্যাপটপ ব্যাটারি (7.7V 37Wh / 4730mAh) বাংলাদেশে — LaptopVai-তে আসল-স্পেক রিপ্লেসমেন্ট, ১২ মাস ওয়ারেন্টি, ঢাকায় ডেলিভারি ও ক্যাশ অন ডেলিভারিসহ।
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