This is a brand new Asus A41N1421 battery for the P2520LA and P2520LJ laptops.

The A41N1421 battery fits all the Asus models that begin with model numbers P2520LA and P2520LJ including:
P2520LA-XO0167H
P2520LJ-XO0027G
P2520LJ-XO0088G
P2520LJ-XO0178D

This is your battery no matter what suffix follows the model P2520LA or P2520LJ.

This battery ships fully tested and ready to go. This battery is frequently mis-ordered because of a very close battery part number. Be sure to check the battery itself for the correct part number. It should match "A41N1421".

This A41N1421 battery uses the highest quality lithium-ion battery cells and components that charge faster, last longer and weigh less than cheaper, lower quality batteries. Lower quality batteries can wear out in as little as 6 months. Our batteries can last up to 500 charges, or roughly 5 years.

Li-ion batteries are not subject to the memory effect common with older battery technology. This means you can recharge your laptop any time without diminishing your battery capacity. This laptop battery replacement is typically superior to the original battery and is 100% compatible with your Asus notebook computer. The battery is individually tested before shipment and backed by 30 day complete satisfaction guarantee and a 2 Year warranty.