KingSener B31N2015 48Wh 11.4V laptop battery

Replacement Battery for Asus VivoBook

The KingSener B31N2015 is a new 48Wh lithium-ion battery built to replace the original pack in Asus VivoBook models such as the K712EA, A712EA, R710EA, S710EA, S712EAM and S712EQM. It delivers 11.4V and 4240mAh from high-quality cells and a matching PCB, and it comes in black with the same physical dimensions as the factory unit. Buyers who need a higher-capacity pack or a different voltage should look elsewhere.

Sustained Discharge Behaviour

The cells are rated to provide stable capacity over repeated charge cycles rather than only a brief peak. Following the maker's guidance, two or three full charge-and-discharge cycles from low current help the pack reach its rated 48Wh, and avoiding continuous adapter connection while the battery is fitted reduces long-term wear. The design capacity is guaranteed not to fall below the stated figure when the pack leaves the factory.

Compatibility Checks Before Ordering

Verify the original battery model number B31N2015 or part number 0B200-03350700 on your existing pack and compare the connector layout with the product photos. Confirm your laptop appears in the supported model list above, because the pack will not fit other series. Store the battery above 80% charge if it will be removed for more than a month, and keep it away from hot or humid environments.