Do I need a charging circuit if my power source outputs 9 volts and 2 amps?
I plan on using maybe 6 rechargeable 9 volt batteries in parallel to run some computer speakers I put into a cigar box and would like to charge them just by plugging the wall wart into the power source from the speakers. Does the need for a charging circuit change based on how much power comes in or is it necessary whenever you want to charge batteries?
Also if anyone wants to suggest a better battery setup, that's great. The speakers need 9 volts and ~4.5w.