How to make 12 volt battery for room emergency led light,diy battery

How to make 12 volt battery for room emergency led light,diy battery
Today i will show you how to make 12 volt battery for room emergency led light, diy battery idea. Simple and easy electronics project make with 4 volt dc battery, in next project i am using this battery as automatic ON OFF room emergency led light and also make this type of battery charger.
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