Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: charging port
Document: The inside of the charging port has a metal sheet that is split at the bottom (you can see the issue here [...] -- it is suppose to lay flat and be seamless, but it is very easily bent. Charging became somewhat trickier but it still wasn't a huge issue.But then the contact pins on the interior of the m-usb started to crumble!
The charging port is poorly designed and shortens the lifespan of your machine. There are videos on youtube and others can help some short term issues. Such as, for whatever reason, a majority of the machines has an issue with the battery connector that becomes loose or already is not fastened tightly within the Nexus. This will cause your battery to not charge properly. You can send it back, or take the back panel off and just push it in. But this obviously comes with risk.
I have just purchased the Asus dock and that seems to be getting the charge times back to 4 hrs, so I think maybe the micro usb port on my nexus is messed up and my battery is maybe OK. And again for those smarta@$es, no I am not running an resources hogging app while I try charging my nexus 7, even though it used to charge just fine before while I used it.
I'm reluctantly giving the Google Nexus 7 one star. I have owned this tablet since September, and I have had escalating issues with charging the tablet. First, the charging cable would not sit securely when it connected to the micro-usb port. It would fall out frequently and I would have to position the tablet at an angle with objects supporting the cord to keep it charging. An annoyance, but not a deal breaker.
I have three gripes about this tablet though. One of the most obvious is that there is no SD card slot, so no extra physical storage but you do have cloud storage such as Google Drive which I love. My second gripe, possibly the biggest one, is that it is pretty fragile. My first tablet broke 3 weeks into use. I dropped it three feet while it was charging and it landed a weird way and the USB port was bent and the chassis popped off a bit.
I was able to bend the USB port back and push the cover back in place and am still able to charge the unit (haven't tried data yet). Advice:  buy a longer USB cable and be especially careful when plugged in and charging, even on carpeted floor. I don't think having it in a case would have helped. The extra weight may have made it worse.I intend to replace the internal daughter board so that the USB cable snaps more completely into the socket again, at some time.
A little disappointed about not having an hdmi port but a great tablet for the price. Would definitely recommend to friends.
So I came home and try to troubleshoot the problem but it looks like the port was defected and started to malfunction after seven days.
The tapering edges provide less surface for the charger to "brace" itself against the device and the upside down port means that others (my family members), by habit, would initially try and insert the cable connector in the wrong way.
I think it's an excellent buy, good screen, good processor, nice battery and slim. I don't give it 5 stars, because it lacks a HDMI port and a rear camera. But for the price is reasonable this lack.
Answer: The charging port is on the bottom.  It's micro-usb, the same as most android devices.