Power Supply - 12V/5V (2A) $50 - $100 com/products/12693)

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can be stacked on top of one another

This rechargeable sealed lead acid battery has a nominal voltage of 12V and weighs approximately 154 pounds

volunteer firefighters

the SparkFun RedBoard Turbo is a formidable alternative

Power Supply - 12V/5V (2A) $50 - $100 com/products/12693)Does your project need a little more *umph* than our wall wart adapters can supply? Why not give this a shot? This 2A "laptop brick" supply outputs both 5V and 12VDC and is terminated with a 4 pin ATX connector. The ATX connector is a standard 8981 Series Power Connector, like the disk drive connectors in your PC. Adapters and cable assemblies are easy to come by at computer supply stores (also, check our related items) so you shouldn't have any