Device uses non-USB charger. Can I still charge it through the USB port? I got a Polaroid L9H tablet for Christmas, which includes a carrying case with built-in USB keyboard. I assume that it is for this reason that the tablet was designed with a barrel connector for its AC/DC adapter, rather than the micro-USB charging I'd come to associate with all modern portable electronics.

I tried to locate technical specifications for the tablet, but could only find the mini-pamphlet provided by the manufacturer, which says nothing either way about this:

If I plug this device into one of the many USB chargers I have distributed throughout my house, will it:


not charge at all?
charge, but not as rapidly as when using the provided adapter?
maybe charge, but probably also damage the tablet?
drain the battery even faster than being unplugged?
ruin the USB port?
explode?


I would really like to know if I can safely plug this tablet into my other chargers, or if I will be forced to bring the manufacturer's cord wherever I take the tablet.
Being on safe side, my guess is No, you can't charge (no, it won't explode but just won't charge) since


User pamphlet shows only way of charging
The USB port may be data only not charging and data. Yes, those kind of ports do exist and you can read How USB Charging works


Having said that, I don't see any logic for having a port that does not charge. It has a 4500 mAh , which is typical and can be charged through USB
Port. There is no reason to have a "data only" port, unless manufacturer has form factor/manufacturing cost constraints. It is actually "odd" to encounter such ports in present day devices

Edit 1

Looks like my guess was right!

Edit 2

Apologies for quoting the wrong product in support of my answer.Fact is that L9H is not covered in FAQ and as OP pointed out, he is unable to register product so product support seems to be way behind

Yet, Polaroid Support Site lists out user manuals for your device in 16GB and 32 GB version

OP had linked in his question user manual which corresponds to 32GB and dies not show USB charging, and shows only mains charging

User manual of L9H 16 GB shows clearly USB Port being used for charging from power pack in addition to mains charging

Conclusion: OPs model is not supported for USB charging, for reasons mentioned earlier (data only USB Port and user manual not mentioning USB charging as an option)

OP can further reach out to the OEM to get additional clarification if needed, but that may not be warranted