Without basic facts like what kind of Kindle you're using it's hard to give much advice. You might try a restart, though. After charging it again disconnect the charger and hold the power button down for 30-40 seconds, or until you see it restarting. Then reconnect the charger. On some models that resets the internal charging circuit. If that doesn't help and your Kindle is several years old then you may have simply reached the end of the battery's lifespan.
whats the life span on a kindle i think I have had my kindle for at least 8 years. If i require a new kindle how do I order one and will the books I have on my old one be transfered along with my records?
The life span depends on use, and no "official" number is available, but eight years is a long time for a Kindle to last. There's no special process to order a new Kindle. You order a new Kindle just like you ordered the first one - place the order with Amazon and pay for it. As long as you register the replacement to the same Amazon account you're using with your current Kindle it will have full access to your library. Books you've ordered through Amazon belong to your account and are available on any Kindle or Kindle reading app you register to that account.
No, there are no discounts for replacing a Kindle that has lasted eight years. The warranty is one year - yours has already gone above and beyond. Your new Kindle will have access to ALL your books. You'll have to download the ones you haven't read yet from your library yourself. FYI you are not speaking to Amazon here. This is a CUSTOMER TO CUSTOMER forum.