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Charge and use spare cellphone batteries Answered

Ok, hopefully I'm posting this in the right forum.

I got LOTS of broken cell phones at home and even some spare batteries from said phones. So what to do? I'm going to use them in some wearable projects.

The problem that I'm having is that I'm not sure how to connect the wires so that I can charge it and how to connect the battery to the circuit. There are lots of instructables here but hell if I can find the right keywords to actually find what I'm looking for. 

Any ideas? Tips for suitable instructables? Tips for better keywords? Keyphrases? 

Best regards!


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6 years ago

Most cell phone batteries can be charged with external chargers, simply drop in and wait for the green light.

As long as all you batteries have the same voltage one of those is enough if you can make charging bays for those batteries that have a different size.

On the battery the positive and negative contacts should be marked.

Obviously the best way to use them would be to have spring contacts like in the phones so you don't have to solder and can pull the battery for charging.

Without that you need a charging socket that can disconnect the battery from the electronics during charge, like a headphone jack for example.