adapter output: 5 volts, 2 amps, 10 watt max. +--o)-- - this means positive on the inside and negative on the outside. I could not find specs to tell you the size of the adapter, but I would estimate it to be about 2mm. Yellow inside the adapter tip might also help. With this info, or if you have the DCadapter - go to your local radio shack (or similar) they should be able to help you find a suitable adapter. By the way, I did not see anything that says the tablet can be charged from a PC through the micro usb port. typically the output on a PC is 5 volts, 1 amp, which could do the job, but would take a long time. Also, PCs may need a driver installed in order to enable charging through the USB.
Yes it comes with a charger the battery life is ok not great but ok it is a very good tablet I would recommend it to anyone but if you have it doing to many tasks at once it will freeze up but that don't happen much I think you will like it on a scale of one to ten I give it an eight you have to remember it not a name brand product so it won't do all the things a name brand product will But for the cheap price it's well worth it
There is no warranty with this product. They give you an address to return it if you have issues. I bought it over a month ago, and I still think it is a great product for what I paid. If it is priced over one hundred dollars shop around.