18650 Flat Top Adapter For BASEN 18650, 3100mAh, 40A Li-Ion Battery

There are two different shapes of 18650 batteries on the market: flat top and button top. The problem is, that it is almost impossible to find burrow top shaped batteries with a high discharge current, which is required in RC cars.

It is used in my brushless HBX 12891 DUNE THUNDER Buggy:
https://www.youtube.com/watch?v=xySioLIqTtw&t=3s
https://www.youtube.com/watch?v=DNuCD_w_XWA
https://www.youtube.com/watch?v=wmVQ2A-Go7w&t=1s
https://www.youtube.com/watch?v=Q6FwcfKPK18&t=8s