I need to replace the internal battery - Kocaso M730W 1.2GHz 4GB 7 Capacitive Touchscreen Tablet Android 2.3

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.

Sorry to read/hear this.
DIY approach first is to attempt replacing the battery inside your tab.

If this option fails;

Then you have to get your tablet to a qualified phone repair/service point. Have them check the internal circuit of your tab.

Something may be amiss internally with a component.

Do a factory reset. Remove all power including internal battery. Let the unit discharge completely. Plug into external power supply and try to start up. If it starts. shut down, put the external cord out , replace internal battery, and recharge for an hour. Now try a strat from the internal batter. If it fails, that s the problem.

I think you answered your own question. If you get a charging indication when plugged in and it stays on only while plugged in, that mean the internal power supply is accepting the charger power and trying to charge the battery but your battery is toast and will need to be replaced. The same principle would apply for any laptop or smartphone for that matter.

the internal battery has reached it's lifespan.....use power bank if you don't want to replace the internal battery..the tab will get the power from the power bank...powerbank is a recharcheable battery with usb connection than can be connected to your tab to power it up....

Is it a different charger? If it isn't try plugging it into a car or at home on the computer or the wall. If that doesn't work maybe getting it checked out will help.

Sounds like a CMOS battery problem, assuming the internal power battery is working fine. May have to get someone to open your tablet PC to replace the battery (cmos)