ELECFREAKS Cutebot Lithium Battery Pack

These are going to be so popular in the STEM Club I run - really great designs and so brilliant to be compatible with LEGO for extra add-ons.

We are using them with our microbits, creating robot combat vehicles.

We've used them with the Wonder Building kits, microbits in both Cutebot and joystick and using the servo motors. They have not been great as three of them have failed completely. The lithium batteries are working but the electronics have failed.