Double Capacity MintyBoost with 4-AA Battery Holder Modification

Step 4 Sever the spring

In order to break the battery holder connection paths into 2 isolated sets of 2 batteries we must break the connection between the spring/rivet pair that is in the middle of the holder. The first image below indicates the point where the cut should be made.

The metal that you are going to cut is very hard. I do not suggest using light-weight cutters like those used to trim electronic component leads. I used fairly heavy duty diagonal cutters like in the second photo below. It’s a tight fit but I was able to get a bite on the metal wire with the very tip of the cutters and while applying grip pressure and a gentle wrist-twisting motion the spring was extricated. Save the spring as it will be used in step 6.