battery charging case

thingiverse

These devices enable you to connect AAA or AA size batteries in series or parallel, depending on your requirements. As a result, you can recharge them or link other electrical equipment as needed. To fine-tune these batteries, use M2 screws, taking into account the slight differences between battery brands. Additionally, you will need screws for making connections between the batteries. The spring force required to secure the batteries is determined by the design and flexibility of the PLA or PETG material used.