Well that means either the manufacturers for the charger didn't make it right or its something wrong with the battery because that has never happened to me. I think you should just get a new charger because I have heard that the MOBI FREE brand isn't that good i would recommend for whatever phone you have just go to eBay and search for new unused iphone or whatever phone you have because when some people buy a new phone they already have the charger so they sell it online.