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Get Locale Power Source Plugin old version APK for Android
Allows Locale (non-free) to detect whether the power source is USB or not.
Plug-in for Locale (which is not free) to detect whether the power source is USB or other (AC/car charger/dock). Can't distinguish between non-USB sources, but you can use other plugins to detect docks.
Needs Android 2.2+ & Locale which isn't free.
Apparently fails on Motorola Droid but I don't have one to test.
What's New in the Latest Version 4
Last updated on Jul 30, 2015
Detect wireless charging (thanks Michael Schlies).
Update to modern Locale UI style.
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Locale Power Source Plugin
4 by Chris Boyle
Jul 30, 2015