Switch between voltage sources automatically and charge battery

Rtlane said:

Also if I use a 3 pin dc jack, theres no chance of the battery powering anything when the wall psu is plugged in and It wouldnt matter if the wall psu and battery is same voltage cause the battery would be disconnected when the wall psu is plugged in.

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Personally, I don't use those any time I don't have to, cause they're the first part to go bad in every piece of audio gear I ever have trouble with, so I don't really trust them. It may be less of an issue with power than with audio, or maybe more. I'm not really sure. Just my two cents.

I'm pretty confident you'll be in good shape with either of the versions you've just posted. Good luck and have fun!