18650 battery case_2s_3s

High currents necessitate soldering, ideally with an 18AWG wire or thicker using a soldering iron. I've tested it without soldering, using a 20A high-current hot-melt adhesive.
The top window allows for easy battery observation or cable tie threading.
The bottom window facilitates battery ejection, while side windows offer additional access.
The case functions as a battery storage container even without the spring-loaded contacts.
In applications without significant vibration, the cover may be omitted.
Designed for compatibility with both flat-top and button-top 18650 batteries, ensuring a secure yet not overly tight fit.
All mounting holes accept M3 countersunk screws for secure fastening or mounting to a surface.
The sides can be joined using M3x6 countersunk screws; this is stronger than a mortise-and-tenon joint, although I found it unnecessary and cumbersome. Requests for configurations with increased battery capacity can be directed to the comments section.

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High currents can be welded with a soldering iron using at least 18 AWG wire. I tested without welding, using 20A high current hot melt consumables
The top window provides convenient access for observing the battery or securing a cable tie
The bottom window allows for easy battery removal, with side windows providing additional access
It also functions as a battery storage box without battery clips
In stable applications, the lid can be omitted
It is designed to accommodate flat-top and button-top 18650 batteries, achieving a secure fit without being excessively tight
All holes are compatible with M3 countersunk screws, enabling connection to or mounting on a board
The left and right sides may be connected with M3x6 countersunk screws. This configuration provides superior stability compared to a mortise and tenon joint; however, I considered it redundant and inconvenient. For designs with increased battery capacity, please submit a comment.