>>5062buy another thinkpad, they usually come with a charger and theyre very cheap if you buy the right model from the right place
alternatively, buy a new charger from ebay for 20$, but you won't get a thinkpad along with it so its more expensive to buy just a charger
or if you know how to, repair your charger
if its just a broken cable itll be easy, if its a busted coil or something it can become tricky