Lenovo B40, B40-30, B40-45, B40-70, B50, B50-30, B50-45, B50-70 Laptop Battery (L12M4E55)

Looking for the lenovo b40 battery price in bd? This brand new replacement battery is made for Lenovo B40 and B50 laptops, including the B40-30, B40-45, B40-70, B50-30, B50-45 and B50-70, and uses the L12M4E55 part number. If your Lenovo dies soon after unplugging, a fresh battery brings back real portable use, and QASWATEC stocks it at Elephant Road, Dhaka.

Key Features

• Brand new replacement battery for Lenovo B40 and B50 laptops
• Matches the L12M4E55 part number
• Fits B40-30, B40-45, B40-70, B50-30, B50-45 and B50-70
• Backed by a 6 month warranty
• Restores normal unplugged runtime

Compatible Laptops and Matching Part Numbers

This pack fits the Lenovo laptops below. Match your old battery label with the part number before ordering.

• Lenovo B40, B40-30, B40-45, B40-70
• Lenovo B50, B50-30, B50-45, B50-70
• L12M4E55

Signs the Battery Needs Replacing

A laptop that shuts off at 30 to 40 percent, drains fast, only runs on the adapter, or has a swollen bottom case needs a new battery.

Why Replace It Early

A weak battery makes the laptop depend on the charger, which strains the charging circuit and risks losing work in a power cut. A swollen pack can also damage the case.

What You Get

You get one new Lenovo B40 laptop battery with a 6 month warranty. Send us your laptop model or the old battery label and we will check the fit for you before you buy, so you avoid a wrong order and a second trip to the shop.

Care Tips for Longer Life

Avoid leaving the laptop at 100 percent on the charger for days, keep it away from heat, and let it drop to about 20 percent now and then, which slows capacity loss.

Before You Order

Lenovo B40 and B50 models share a battery, but a quick check of the label under your old battery saves a wrong purchase. Bring the old pack to Elephant Road and we will compare it side by side.

Buy Lenovo B40 Battery from QASWATEC

QASWATEC has served Dhaka computer buyers since 2010 from Elephant Road. Call or visit to confirm stock and get your Lenovo laptop running on battery again.