Battery needs replacement

Replacing the batteries is not an easy job. You need to have a special Torx screwdriver to undo the screws.

The batteries are soldered onto the Control Board (it's unfortunately not just a case of cracking open the case and putting in batteries in an instant)

It may be worth speaking to your local Philips Service Center (refer to www.philips.com)

Your shaver should also be a Mains shaver - if you plug it in and it works full power immediately you've got a workaround. I usually recommend if you're replacing a shaver to spend a little more $$'s to get one that is mains and rechargeable so that when the batteries die, the shaver is still useable.