Detect whether it is the fault of Battery or charger using compatible notebook battery and chargers(Same voltage and size);
Make sure all cables are properly connected;
Make sure the battery for battery is not dying, Lithium ion battery has limited battery charge-discharge cycles of 500 times also, Getting our cheap replacement battery save your time and money a lot.
If you want to get a new battery, then I suggest
http://www.battery4us.com .