This is a charger I have created for my small bluetooth controlled track loader.
This makes it possible to charge the track loader with a standard phone charger that uses micro usb plug.
It also enables you to check the cell voltage of the battery inside the track loader. When no usb cable is connected it displays the actual cell voltage. When a usb cable is connected it display charging voltage.
Through the 2 small holes in the bottom you can check if its still charging or its done.
1x Voltmeter 0-10v https://goo.gl/2HiWuQ
1x Micro USB 1A Lithium Battery Charging Board https://goo.gl/8sNed9
1x 2 pin SH size connectors https://goo.gl/r2ni9r
Wire 26AWG https://goo.gl/FHaNNT
PAD-11 Crimp Tool https://goo.gl/U5KtBk
Printed in PLA.
Only toolbox main body needs support.