Have a quick surf before going to casualty with a screwdriver through your hand.
I can't be bothered to look it up, but there are people who "Re-Cell" rechargeable gizmos of all kinds, for a fraction of the price.
Worth a look.
If you are going to try and open it yourself, put the camcorder on first.
The '"You've been Framed" payout should more than cover a new shaver.