People would like to buy Possway T2/T3 electric skateboard with another battery pack. If you have one and no idea how to replace it, watch the following Youtube tutorial video: 

Here is a short summary of how to replay the battery pack: 

Step 1: Turn off the board and remove the battery pack with the Y tool.

Step 2: Connect the battery interface and fix it.

Step 3: Turn on the board and test.

I hope this is helpful for you. Here you can buy  Possway T2/T3 electric skateboard's battery pack:  https://www.possway.com/collections/accessories-amp-parts/products/electric-skateboard-battery-pack-10