Looking for a replacement Laptop battery? Check out PSA Parts Ltd I've just bought a battery for Asus Zenbook WX310UA and while expensive at £70 is genuine. It took a couple of weeks to arrive as it wasn't in stock when I ordered. The Laptop now holds its charge and the MS Battery report indicates it has slightly more than the nominal capacity. I did try ZandParts as recommended by someone on here but after 4 months they still had no idea if one was available and when it could be delivered.