“The microbit accessory kit is useful for its intended purpose, of course, but can also be used with other microprocessor products, including the Inventor 2040W kit and other boards using the 2 pin JST power connector and the Micro USB. It is really handy that "batteries are included" as the kit can be used immediately, without looking for some AAA alkaline batteries. Good value for money.”
“Very good accessory to power micro:bit. works as expected and fits very well with micro:bit. I'd love it more if the battery pack came with an on/off switch. Not a big issue though, but it would be more convenient.”