Battery Replacement on Philips NorelcoElectric Shaver - 5000 Series (How to 4K)

Weexplain how to replace the battery in a Philips Norelco electric shaver. In this case the shaver is of the Series 5000, but the procedure is similar with other models/series.
As tools we will need a Torx T-8 screwdriver and a soldering iron.
First remove the screw on the back of the shaver. Then start to remove the back cover. Make sure to check out the hint on the video of how to accomplish this without damaging the plastic housing.
Next remove the shaver head and the front cover. Then remove the clear plastic piece at the front by releasing the small plastic clips.
Now we have access to the motherboard and the battery. When removing the board, make sure not to damage the two wires, which are connecting the board to the motor. The battery is soldered onto the board (look for the two big solder joints on the board). We have to heat up and remove the old solder (vacuum pump or solder braid) and remove the old battery, which is held in the plastic cradle on the bottom of the board.
Make sure to remember the correct orientation of the battery! The negative pole is pointing towards the bottom of the board, while the positive pole is pointing towards the top of the board (where the two switches are located).
Solder the replacement battery into position and reassemble everything in reverse order.
Good luck!

0:00 Intro
0:12 Disassembly
2:50 Removing the Battery
3:45 Installing the Replacement Battery
4:48 Reassembly
5:47 Conclusion