It is useless for most people, but for the DIY nerd who uses AA batteries often, this is a great stuff
DIY complete homemade AA battery case, extendable, failsafe
Last time I have made a hair cutter. It works very well but I fell a little bit restrict since it uses a USB power supply. The reason I use USB power is considered that the AA battery is not so stable and not support for a long time working. But I may be wrong since I use another AA power supplied drill gun and already worked for me a long time. I will change the hair cutter to AA battery supported type for convenient use in the next version. Also, I often use AA battery it is a need to make a battery case. I have checked the internet that the battery case usually uses spring and not flexible and not expandable. I make this small case can work flexible and expand to any size and have a fail-safe structure. Hope it will help you. It is useless for most people, but for the DIY nerd who uses AA batteries often, this is great stuff.
It is very easy to increase the voltage by attaching another case.
I made this video for fun and tell you about what I have learned. I hope we can learn from each other.
This is not the first attempt but I think it is a good example to get new ideas to make things smooth. I wish someone will get some idea through the smallest thing. Also, I hope they will share the experience with us making the world a better place.
Don’t forget to subscribe to this channel. Your support is my best happiness. I will continue to update the video. I hope it will give you some help. Thank you very much.
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STL file for making AA battery case
All of them have been adjusted for printing without support
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