KingSener A31N1319 laptop battery 14.4V 2600mAh 33WH

Replacement battery for Asus R512 and F551 series

This 14.4V 2600mAh lithium-ion pack replaces the original A31N1319 cell in compatible Asus laptops including the R512, R512C, R512CA, F551, F551C, F551M, D550, D550C and D550CA models. It delivers 33Wh of rated capacity using Korean-made cells and a matching black housing that fits the existing bay without modification. The part is supplied new and carries a one-year warranty from the manufacturer.

Voltage and capacity define the practical limits

The battery operates at a compatible 14.4V and stores 33Wh, so runtime scales directly with the laptop's power draw rather than any external interface. No charging circuit or connector changes are required because the pack uses the same electrical specification and physical footprint as the factory unit. Users should follow the maker's guidance to cycle the pack fully two or three times at first use and avoid leaving the AC adapter connected continuously while the battery is installed.

The 33Wh rating decides if this is the right part

Check the original battery label for a 33Wh or 2600mAh rating at 14.4V before ordering; a higher or lower design capacity means the laptop's firmware may report incorrect remaining time or refuse to charge fully. The part number A31N1319 also appears as A41N1308, A31LJ91 and X45LI9C on some revisions, so matching any of those codes confirms compatibility. Buyers who need more stored energy than 33Wh cannot be served by this model.