Hello. In this video i show you how to upgrade the parkside battery pack.
If you do not have sufficient knowledge of li-ion battery please don't repeat this upgrade.
STL file making by Gabriele Gatti, the link you can find in descriptions.

STL files: https://www.thingiverse.com/thing:468...
Lanzhd 3300mAh 30A 18650 Li ion battery: https://www.aliexpress.com/item/32888...
Board Spot Welding: https://www.aliexpress.com/item/40011...