Universal Batteries Testing Holder (AccuFrame)

thingiverse

If you're constantly dealing with numerous gadgets and batteries, it's a good idea to know which batteries are reliable and which ones are running out of resources. The testing process is well-known (charge-discharge while measuring capacity) but what is really needed is: The Universal Battery Holding frame with spring-loaded contacts. To build one, you need to print all parts and prepare: 1. 4x M2x20 screws + 4x M2 nuts + 10x washers 2. 2x M3x30 screws with hidden heads + 2x Self-Locking M3 nuts 3. 80mm lengths of 4mm^2 single copper wire (to make the contacts) (OD=2.2mm) 4. 2x springs: OD=4mm, ID=3mm, L=25mm (from cheap pens) - for contacts 5. 3x springs: OD=5.5mm, ID=4.5mm, L=17-20mm (from the springs kit) - to assemble the Platform The ghosted overview image shows copper contacts in orange and springs in blue. A) Make the contacts according to the attached image (bend and solder M2 washers as spring stoppers) B) Solder wires to the topmost ends of the contacts C) Assemble the Contacts Parts (Contacts + Springs from #4 + "Cartridges" parts) D) Assemble the Cartridges "Holder" + Contacts Parts (use only 2 M2 screws to fix the top of the Holder) E) Put both "Handles" into the "Frame" (check orientation) F) Attach the "Frame" to the "Holder" (2 more M2 screws) G) Assemble the Platform Support (use 1 spring from #5 to load the Handles) H) Attach the Platform to the Support (use 2x M3 screws + 2x springs from #5 + M3 nuts) Printed with ABS at 50% infill and a 0.4mm nozzle. That's all!