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batteries, DIY, solder, solder li-ion batteries -

As someone who is a DIY Extremist, I want to start sharing some information that I pick up as I am planning on future projects. I have always been fascinated with batteries. Starting in the 60's with the expansion of battery operated devices like radios and toys.  I had a slot car track and train stuff and they had DC output transformers to operate those motorized hobbies. My attempts to extend the life of batteries was a lot more dangerous, now that I look back, than I realized at the time.  So moving on to today, I want to share...

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