How do I open the case to change the battery?

Braun Series 3 Electric Razor disassembly and battery replacement (original and AA NIMH batteries) (youtube.com)

Braun 9-in-1 Trimmer - Disassembly/Battery Replacement (youtube.com)

Remove the Screws: First, you'll need to remove any screws that hold the device together. Look for visible screws on the casing or housing. Use the appropriate screwdriver (usually a Phillips or Torx) to carefully unscrew them.

Open the Casing: Once the screws are removed, gently pry open the casing. Be cautious not to damage any delicate components inside. You can use a flathead screwdriver or a plastic opening tool for this step.

Access the Battery: Inside the casing, you'll find the battery. Depending on the specific Braun device, the battery may be soldered in place or connected via a connector. If it's soldered, you'll need to desolder the connections. If it's connected via a connector, carefully disconnect it.

Replace the Battery: If you have a replacement battery, insert it in place of the old one. Make sure to observe the correct polarity (positive and negative terminals). Secure the battery back in its position.

Reassemble the Device: Put the casing back together, aligning all the components properly. Screw it back in place.
Test the Device: Once reassembled, check if the device powers on. If it does, congratulations! You've successfully replaced the battery.

It is not that young anymore. The rechargeable battery is (almost?) dead. It is almost impossible to replace it. I once tried it, took me more than a day yo put everything together and still it never was as before.
I have bought a new Braun (799) and I'm convinced this one will live longer. The rechargeable battery in this one, you can shave one hour before you need to recharge it. It lasts a week with me, or sometimes even longer, before I have to charge it again.

Perhaps you just use the shaver with the power cord, like we used to do for 20 years, and start saving for a new one?

Hello

Remove the electrical cord from the base of the shaver.

Press down and slide off the panel on the front of the shaver.

Remove the two nickel-plated batteries. Use these batteries as a guide to purchase new batteries at a hardware store or home repair store. Recycle the old batteries when finished. (Many hardware and home repair stores have battery-recycling stations.)

Put the new batteries inside the shaver and press gently to pop into place.

Place the front panel back on the shaver and plug the electrical cord into the bottom of the shaver. Connect to an electrical outlet to charge.

THANK YOU FOR VISITING FIXYA

The battery is inside the shaver body. You must remove the rubberized grip to access the screws to disassemble it. You can not use any rechargeable battery. The battery is lithiun ion. The correct battery is available at shaveroutlet.com. See link below

http://shaveroutlet.com/shaver-replacement-parts/braun-liion-barrery-for-pulsonic-model-shavers-p-836.html

There are two round screw covers on the bottom. Pry these out to reveal two screws. Remove screws and then the out case can be slid downward and off. You can then access the batteries

Replacement batteries for model 5614 can be found at shaveroutlet.com. See link below

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

In that case, the circuit board in also bad. This happens when the batteries aren't changed in a timely manner. You can buy a circuit board with batteries at shaveroutlet.com. See link below.

http://shaveroutlet.com/braun-printed-circuit-board-with-batteries-p-107.html

To open the shaver you will need to remove the two plastic screw covers on the bottom on either side of the port where the plug fits in. Then remove the screws underneath. The outer case will then slide off the bottom. You may need to reposition the travel lock to get it all the way of. Then unsnap the black plastic back of the inner case and remove it. You can then lift out the old circuit board. Reassemble in reverse order.

You will need to replace the battery pack. Depending on when your shaver was made, it may have one of two different battery types. You will ned to look inside to see which you need before ordering.

To open, remove the two round screw covers on the bottom of the shaver. Remove screws to remove bottom of shaver. The outer case will then slide off the bottom. Push the trimmer up to be abl to take the circuit board out. BE CAREFUL not to detach trimmer oryou will not likely get it back on yourself.
Your battery(s) will be one of the two types below found at shaveroutlet.com

http://shaveroutlet.com/replacement-battery-for-remington-df-ms2-some-braun-p-213.html

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

Be sure to read the Note on the second link concerning instalation

If you are unable to do this yourself, shaveroutlet.com can do the repair for you. See link below

http://shaveroutlet.com/professional-battery-replacement-for-most-models-p-374.html

If working properly, model 5510 will work either from the internal rechargeable batteries or directly from the cord. If your shaver no longer recharges, it needs to have the rechargeable batteries replaced.

if the shaver is DEAD and the green light no longer illuminates when you plug it in, the circuit board is almost certainly bad. The circuit board will burn out if you run the shaver from the batteries for a long time after the batteries have stopped charing properly.
you can purchase a new circuit board which has the batteries alrady on it. it just needs to be dropped in place inside the shaver.
you will find this part at shaveroutlet.com. see link below

http://shaveroutlet.com/braun-printed-circuit-board-with-batteries-p-107.html

If you are handy and know how to solder (and have the tools required), you can probably do the replacement yourself.

At the bottom of the razor are two plastic caps on either side of the charging port, you'll need to pry them out with a sharp pick or thin knive tip. Once removed, you can get to the screws that hold the front and rear case halfs onto the main shaver chassis where the PCB with the rechargeable battery is soldered onto the board.

Unsolder the battery and solder in the new replacement battery and put the case back together, making sure all the parts are in the correct posistion, and you're ready to recharge the shaver and start shaving again.

To find your replacement battery, try Electric Shaver Service. They also do repairs, so you might want to get an estimate if you don't want to do the repair yourself, etc. They're reliable and fast in getting shavers repaired and back to you quickly. 1-888-476-1785

Here's a link to the page with your battery on it and the toll free number to call for estimates too.

http://www.electricshaverstore.com/search.asp?p=2&w=%5F&c=battery&t=s&m=0

Hope you find this Very Helpful and best regards!