In this video I'm going to share my UNI-T UT39A MULTIMETER BATTERY solution with you. How I convert 3.7v lithium battery into 9v(+-1.2v) rechargeable battery. This is one of simple way to do.
How To Make 9v Rechargeable Battery At Home
how to make 9 Volt battery
homemade 9 Volt battery
simple way to make 9v battery
how to make 9 volt battery without converter
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