inputs.text: little extra protection - use one comes 2 different types connectors laptop used one several years no problehem not expensive protects laptop external power supply power surges spikes much better alternative always plugging laptop bulky surge protector especially going different places since connects cable plugs wall external power supply sacrifice prevent damage means not replacing expensive power adapter worse yet laptop data would highly recommend product targus complaint comes 2 different types connectors would prefer came 2 adapter types available since available two pack different adapters one done nothing collect dust years