I HAVE A DELL INSPIRION 1520 LAPTOP AND IT ALL THE SUDDEN STOPPED WORKING ON THE BATTERY. THE BATTERY SHOWS 100% CHARGED AND I ALSO PUT IT IN ANOTHER DELL INSPIRION 1520 LAPTOP THAT I HAVE AND IT WORKS IT FINE. BUT ON THE ONE WHEN YOU PULL OUT THE POWER CORD IT SHUTS DOWN. CAN ANYONE HELP WITH THIS PROBLEM.