The best coin cell battery charger in the market. It can charge LIR2032 and LIR2025 coin cell batteries.Designed by Potato Company in Australia
I make a lot of coin cell powered projects and use the LIR2032 batteries quite regularly. The rated cycle of the LIR batteries are 500 cycles but in reality, it does not last that long. I did a bit...Read More…
I make a lot of coin cell powered projects and use the LIR2032 batteries quite regularly. The rated cycle of the LIR batteries are 500 cycles but in reality, it does not last that long. I did a bit of research and found out that the cheap Chinese charger was the culprit. Another thing is that you need to insert two batteries at the same time to charge. The voltage and charge of two batteries will be different and this will eventually ruin one of the batteries.
I had two choices to make.
I could either rant about these faults or could make my own improved version.
I took the later path and made my own coin cell battery charger.
A lithium battery should be charged in three stages. If the battery voltage is less than 2.9V then it needs preconditioning. The battery is trickle charged. This phase brings the battery voltage up to a safe level for full current charging. Then a constant current 30mA full-throttle charge and finally a constant voltage trickle charge to keep the battery topped up.
Slide the coin cell in the right way. Power the device with a USB port. The BLUE led will turn on indicating it is getting power from the USB port. When the battery is charging, the RED led will turn on. It takes about 4 hours to fully charge. The BLUE led will turn off to let you know when it is fully charged.
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