This Dell E6540 laptop is a nightmare, from the day I received it, the battery would intermittently not charge, sometimes would charge from the docking station.  Then, while the laptop was in-use, the battery showing full charge, I would get a message "can't communicate with battery" and the laptop abruptly shut down.  Even ordered a new battery - same issue.  Now, it won't charge batteries at all -with a dead battery, the laptop won't boot at all - makes it completely unusable.  Now over 90 day warranty - I tried contacting SKYTECH and they don't accept emai!  Bad news.  Googled and found many folks with same issue.-----------HiSorry to hear about the problem. If the laptop turns on couple secs and shut it back down, normally it indicate the charger is bad. Do you have a spare charger to test with the computer?Please let us know.  Thank you.AST Customer Support-----------I did try another charger - it won't charge the battery nor will it power the laptop, just like the original charger.I ordered an external battery charger, hoping it will get me through.  I did not even get a year of use out of this Laptop.