hjohnson wrote:Have you taken a look at step-up voltage solutions? It of course depends on how much power you need (you said you need over 12 volts, not what amperage you're running at).
That way, you could have the lipo charger, powered by external DC to power the system and charge the battery, and run the output of that to a boost converter to always get you your 12V. For more information, check out Dave Jones's tutorial on switching regulators here: http://www.youtube.com/watch?v=qGp82xhybs4
footswitch wrote:I'm looking for the exact same thing.
A standalone accessory that would handle all-things-power: just plug to AC, and output regulated 5V DC, handling up to 3A (4 seconds peak, normal consumption is 300mA @ 5V), with a battery charger featuring automatic switchover and low voltage cutoff to prevent wrecking the battery.
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