Braun 330s battery replacement - Health & Beauty

The basic method is:

1. Dismantle handle.
2. Desolder old battery and other connections from PCB.
3. Remove charging coil, pressure warning light, pressure switch, PCB and battery.
4. Replace battery.
5. Reassemble PCB and other parts.
6. Solder in connections for parts and new battery.
7. Reassemble handle.

https://toothbrushbattery.com/guides/braun-oral-b-professional-care-1000-battery-replacement/

I don't know about this specific model of Braun shaver (I have a Braun Model 7526).

I have looked at the instructions for a couple of models of Braun Shaver, and the instructions are similar so it may help you to replace the batteries in yours.

Here is one of the instructions:
Braun 7526 battery problem
http://www.fixya.com/support/t1171024-braun_7526_battery_problem

Open the shaver:
1) Use a small flat screw driver pry off the bottom (where the cord plugs in)
2) Remove the silver sides
3) Using a small torq driver remove the 4 screws
4) Open shaver
5) Remove circuit board with batteries
6) Remove and replace circuit board with batteries (or solder in the new batteries)

And here is a link to instructions for a few different ones:
http://www.fixya.com/support/t1094906-needs_new_batters_open_razor_7526

http://www.fixya.com/support/t6710169-change_battery_cost

http://www.fixya.com/support/t771258-braun_battery_replacement

I don't see yours here but you may get an idea from other models.
braun 390cc replace batteries YouTube

It appears that the battery needs to be replaced. shaveroutlet.com has the battery you need and installation video. They can also replace it for you
Braun Lithium Ion Battery for Pulsonic and Series 7 Model Shavers
Braun Series 7 Shaver Disassembly Tutorial Professional Battery Replacement for Most Models

You will find original Braun replacement batteries for model 4775 at shaveroutlet.com. See link below

http://shaveroutlet.com/shaver-replacement-parts/braun-battery-nicd-2-batteries-p-454.html

You will find these batteries at shaveroutlet.com. See link below

http://shaveroutlet.com/shaver-replacement-parts/braun-battery-nimh-2-batteries-p-105.html

You will find the correct battery type for Braun 5556u at shaveroutlet.com. See link below

http://shaveroutlet.com/shaver-replacement-parts/shaver-replacement-battery-aa-nimh-p-108.html

On amazon you can find battery + kit for replacement, take a look here: HQRP 2 Pack Batteries for Braun Flex XP Model 5663 Type 5720 Razor Shaver... . I hope this was helpful. cheers

If you just need a eplacement cord, you can get one at shaveroutlet.com. See link below

http://shaveroutlet.com/braun-charger-cord-for-7000-syncro-8000-activator-360-complete-p-120.html

If you need batteries or PC board, this will raise the price considerably and you may find a less expensive option of buying a replacement. You will also find similar replacement units at shaveroutlet.com

go to the braun site for replacement parts or do a search in your browser for discount braun parts.