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Electronics hobby blog


An important thing for a man is to be able to retreat to his own space and do stuff inside it what one likes. Although I have an area on the attic it didn't give me the feeling of complete dominion, so I have decided to create a mancave inside the shed that was outside of the house.

18650 battery charger

18650 batteries are known for it's high energy density, but this comes at a price. In order to protect the battery from overcharging or over-discharging a number of ICs need to be used. Luckily these charge and protector circuit boards are readily available for sale in all shapes and sizes. In this blog post I am going to build a charger that uses such a circuit.

Not only the charger can use protection circuitry, but also the battery itself. When buying the batteries make sure that they are protected. I have bought mine in a Chinese online webshop.