Here's the thing. I have a portable audio amp that runs off 12v lead-acid battery. I feel that it is time for an upgrade, but I have one limitation, the battery. I want to boost the voltage from it. The most ideal would be around 24 volts, but any improvement would be appreciated. My amp draws around 1-2 amps at loudest settings, but I haven't tested it accurately. My amp can handle 24 volts, so no problem there. Since I am a complete newbie at power supplies and a beginner in electronics, what would be the best solution, if there's one?
Also I can't go out ant buy a new battery, and the project should cost around 10 euros, so no expensive solutions.
Thank you for your help.