Need Help with a power supply for a 12 volt DC project

[Moonlit Road]

Hello everyone. I built a boombox out of a tool box. The radio is powered by a 12 V alarm battery that is mounted inside the box, and it also helps keep the memory on the stations. To charge the battery, I am right now using a bench top 13.8 V regulated power supply. I would like to do away with that, so I can make the radio more portable, and look nicer. What I need is how can I make , or what do I need to get , to get 120 VAC from the wall , to inside the box, and then convert that to 12V DC so I can keep the battery charged, and power the radio at the same time, and have it look nice and neat? Thank you

 

[Minder]

Wall Wart? What is the current required?
M.

 

[Moonlit Road]

No more than 5 amps

 

[Minder]

Wall Warts are common for 12vdc, if you need the 13.8 to charge with you would have to maybe pick up a AC version and tailor it, I have done this before, they are usually non-SMPS however, just a simple transformer, but often they can be opened up and tailored and a regulator fitted in the same case and re-sealed, just requires getting a little creative.!
M.

 

[cowdough]

Hello everyone. I built a boombox out of a tool box. The radio is powered by a 12 V alarm battery that is mounted inside the box, and it also helps keep the memory on the stations. To charge the battery, I am right now using a bench top 13.8 V regulated power supply. I would like to do away with that, so I can make the radio more portable, and look nicer. What I need is how can I make , or what do I need to get , to get 120 VAC from the wall , to inside the box, and then convert that to 12V DC so I can keep the battery charged, and power the radio at the same time, and have it look nice and neat? Thank you

laptop charger

 

[sundy]

It depends on what type of battery. If you use a constant voltage you will ruin your battery in no time.
I use these for my boat and motorcycle. http://products.batterytender.com/Chargers/