This is a 18650 cell holder for a charger. Depending on your needs this can be wired in serial or parallel. In my picture it's in parallel to charge all batteries to the exact same level for testing.
Printing is straight forward. Two parts that are hold togehter with 4x M3 sunk head screws.
The springs are ordered from Aliexpress (just realise that price doubled since I ordered them a year ago): https://www.aliexpress.com/item/32818956569.html?spm=a2g0o.order_list.0.0.21ef1802uFo53Q
18650_Spring_Holder_Bottom_6x_parallel_v1.stl | 223.5KB | |
18650_Spring_Holder_Top_6x_parallel_v1.stl | 77.4KB |