How to wire a ciruit to charge a lead acid battery when needed and power a audio amplifier?
I have a small audio amplifier i am trying to power off of a lead acid battery to make it portable. I want to make it so when you plug in a power adapter it will be able to charge the battery and run the amplifier at the same time. It is a 30 watt amplifier. Should i connect the power adapter to the charging circuit and the audio amplifier in parralel? And then connect the battery to the circuit in parralel? I was thinking of using a laptop power adapter as the power source. I forgot to put a diode between the battery and the amp to prevent the power supply from charging the battery directly through the audio amp parralel connection. Would this work? Else what should I do?