How do I make a AA Battery pack?

Question

MY idea is to have a battery pack that runs on AA's that I can use to charge multiple devices(mp3 player,cell phone, portable DVD player, etc..).

I can use both a dc plug(the kind that plugs into a car) or an ac plug. (would prefer that it used ac if possible).

I would seperately charge the AA's.

Can I just hook up a dc outlet directly to the batteries, because the dc plugs have transformers built in, or do I need to do more?



How do I go about making one of these

Answer 1

You need to study electronics -- one of the functions of a transformer is to block the flow of DC from the primary to secondary coils. In other words, a DC-to-DC charger will not use a transformer.

A DC-to-DC charger is a good idea, however, and I've seen such things to charge cellphones. What might work for some people would be a battery that would charge from the power port in a car, which could then be used to charge cellphones, laptops, MP3 players, etc. Of course, you could always just charge the cellphone or whatever from the car directly.

You can buy AA battery packs at Radio Shack, which also sells a wide variety of connectors. In fact, Radio Shack would be a good resource for experimenting with DC-to-DC chargers.

Answer 2

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Answer 3

U can buy It from The MARKET