My nextbook will not charge where is the battery located

Take your Nextbook to a local repair shop. Those charging ports are usually replaceable, but it requires knowledge of soldering and you need some expensive tools in order to do it yourself!

Hello, Jessy -

The rechargeable battery for your Nextbook probably needs to be replaced. Eventually all rechargeable batteries need to be replaced.

Make sure you order or purchase in a bricks and mortar store the right battery for your Nextbook.

I don't know what model of Nextbook you own, but these instructions may prove helpful to you:
https://www.ifixit.com/Guide/Nextbook+8+Battery+Replacement/39351

If you do not feel comfortable in following the steps provided in the link above, find a reputable computer repair business near you, take your Nextbook there, and ask a technician there to open the Nextbook, determine what battery is needed for replacement, order the battery, and install it. Note: You will probably be provided an estimate of the cost of the work and will probably need to pay an initial fee which will be deducted from the final cost of the battery and the technician's work.

Best wishes.

Hello, Bridget -

If you have had your Nextbook for a while, the rechargeable battery may no longer be holding a charge.

Even rechargeable batteries wear out and need to be replaced.

You can probably find the right replacement battery (for your Nextbook model) to purchase through the Nextbook home page.

see if this link helps you out.
While charging the battery drains on my nextbook tablet Google Search

nextbook is showing a yellow light while charging but wont

Try a reset. These apps have an unreliability factor on tablets.

http://nextbookusa.com/download.php

Replace battery

Can mean the battery isn't communicating its status to the tablet--failing battery, bad connection, etc. Talk to tech support for a replacement if it's still under warranty. If it's not and you can still charge it to 100%, hang on and hope for the best.