Finally found some information on the Ninja Blast blender that seems to fail often while charging. The internal battery is two 18650 cells in series for a 7V output. Nothing fancy; just like other small appliance with 18650 cells. When the Ninja Blast stops charging, it’s either due to low battery in the cells or the USB charging port not having voltage. Using a multimeter to check the charging port while the blender is plugged into USB should read around 5V. If there is no 5V on the input, the issue is the charging port, not the cells. If the charging port is fine but the battery is low, then the only fix is to replace the cells. Given that soldering to 18650 cells can damage them, using a spot welder or buying pre-tabbed 18650 cells is advise.
What exactly holds the cells in the Ninja Blast blender pack and where is the BMS locate? How exactly are the cells attached to the pack? Is the BMS on the same board as the charging port or is it a separate component that can be removed to replace the cells? Does the BMS protect the cells from overcharge or will it cause them to fail if you use higher capacity cells?
What exactly holds the cells in the Ninja Blast blender pack and where is the BMS locate? How exactly are the cells attached to the pack? Is the BMS on the same board as the charging port or is it a separate component that can be removed to replace the cells? Does the BMS protect the cells from overcharge or will it cause them to fail if you use higher capacity cells?