Ninja Blast charging issue, anyone swapped the 18650 pack?

spot welder is overkill for this. Pre-tabbed 18650 cells can be had on aliexpress for around 8 bucks shipped so just solder the tabs on the cells rather than the can.
 
spot welder is overkill for this. Pre-tabbed 18650 cells can be had on aliexpress for around 8 bucks shipped so just solder the tabs on the cells rather than the can.

pre-tabbed cells are fine but the tabs that come pre-welded to the cells are usually thin garbage steel that is just nickel plated. For blending application proper pure nickel strip is preferred.
 
opened mine up last month. Confirmed bms is on the same board as the usb port and the cells are held in a plastic cradle with double sided tape. Comes apart with a spudger going around the seam. Four plastic clips to pop, no screws on this model.