Java Jive <ja...@evij.com.invalid> wrote:
> Despite others' replies up to this point, all of which I've read, I have
> to report that trying to keep my tablet charged via the USB socket of my
> Skoda Fabia doesn't really work reliably. Without any warning, after
> some distance, I find the tablet turning off, and when I examine why, I
> find that its battery is completely exhausted, despite it having been
> plugged into the USB socket all the while the car was moving.
If you leave the tablet turned on, ie don't shut it down, it's possible you
aren't running the engine long enough to give it much charge. eg if you
drive for half an hour, if the USB socket is only giving it 500mA, it's only
received 250mAh. The battery could be 5000mAh, so that's a topup of 5%.
Then if you leave the car parked for a few hours it'll run down that charge.
Eventually it'll run down the battery enough to turn off, but then the car
won't charge it very much next time.
This is especially bad if you have location and mobile data turned on - the
tablet may be chatting to Google/etc, which eats the meagre charge you
It's why a fast charger makes more sense in a car than many other places,
because you often only spend short periods in the car and you engage in heavy
battery-draining activities (satnav, music streaming) while doing so.
> I seem to get better results from the cigarette lighter adaptor that I
> used with previous cars that had no USB socket.
> Worse still, I copied a load of music onto my tablet to have something
> to listen to on a recent long trip to a family do, but could not get the
> car to recognise the tablet as a storage device.
The car is probably expecting a USB Mass Storage device, ie a USB stick.
The tablet probably doesn't present as that - Androids are usually PTP or
MTP, while I'm not sure if iPads do anything except iTunes.
(Android 2 and 3 supported USB Mass Storage, so there are old guides
floating around about how to enable it, but they don't work on modern
tablets. The problem is you had to unmount the storage from the tablet
before the computer could see it, which is awkward for anything the tablet
wants to use)
I'm not sure if there's a workaround to make an Android export Mass Storage
for a subset of files - maybe there is if you're rooted.
> So for me, it has to be tablet, for the Navigation app, connected to the
> cigarette lighter socket, and a USB stick in the USB socket, which seems
> unnecessarily retro.
Try playing music from the tablet and connecting to the sound system via