A:AnswerThere's absolutely no reason you couldn't use any USB charger for this, including a lighter socket USB charger (I assume that's what "auto charger" means). It needs 500mA, which any port should be able to provide (except very low quality <$5 ones, perhaps, regardless what they're rated).
A:AnswerIn order to connect it to my computer I have to disconnect it from my iPad or my phone. I use mine with all three but can only have it connected to one device at a time.
A:AnswerYes it can be. It is water resistant however it is not able to be submerged. But just sitting it or hanging it in the shower works amazing... sound quality isn’t that bad for such a small speaker as well...
Hope this helps
Mr Joe Nova