New battery for Wii U gamepad

Hello, I would like you to indicate me an online store where to buy a good quality battery for the Wii U gamepad, since most that I have seen are Chinese of poor quality. Thanks in advance, greetings from Aguascalientes, Mexico.

You don’t have to resign yourself to trying to find a battery exclusively for Wii U, you could just check the lithium type (i forget as it’s been so long since i opened one) whether it’s Ion or Polymer

There is so much space inside the gamepad you could fit pretty much anything you wanted… use a phone battery if you wanted, just solder the wires directly to the connector or cut the ribbon and solder that to the battery, either/or

Ok, sounds as a good solution, i will try. Thanks.