2AA Rechargeable Battery Holder Add-on Box

thingiverse

This is a versatile box-and-lid designed to hold a 2-AA battery holder, which can then be effortlessly connected to any device that traditionally relies on a button cell - such as CR2032 - but where you're now fed up with repeatedly purchasing button cells and would prefer to convert the device to use rechargeable batteries instead. In my own case, I accomplished this for my bathroom scale. I had also done this in a previous project for a kitchen scale. To achieve this conversion, you will need access to some basic soldering equipment and skills, as well as the confidence to take apart and reassemble a low-voltage electrical device with ease.