I have a Braun System 123 Model 3512. I replaced the batteries once before from a different supplier…getting the tabs to fit in the circuit board was difficult. But Shaver Outlet’s batteries were a five minute soldering job…easy! Works great, and my razor is still going strong after 38 years, thanks to Shaver Outlet. Thanks!! (Posted on 12/31/2023)

Thanks to your video on the installation of the new batteries the install was easy.
Thanks for a getting my shaver going again. BG (Posted on 3/31/2021)

Great little shaver that deserves to get a second life

If you want to do this, make sure you have a proper soldering pen (i used the $40 weller wlc100.

Batteries are identical in size and have longer charge (I am still on the first charge and it's been almost a month!)

The reason I didn't give it 5 stars?

The welded on terminals are centered and the OEM batteries are slightly off center, so when you go to add them you have to carefully bend the soldered tabs to match

Technically not "exact" replacement

And as others have said make sure you fully document the alignment of the old batteries before you desolder them off...take the new batteries and get them lined up before you start soldering. There is no wiggle room, the new batteries have to be exact or it will not reassemble properly (Posted on 3/22/2017)

Perfect replacement (Posted on 2/10/2017)

As one of the other reviewers stated, it takes some skill and a steady set of hands to replace the two batteries but the result was amazing. I fully charged the shaver and I have been shaving for two weeks and one day and it still does not need recharging. That's over a week longer than when I bought it new 8 or 10 years ago. I recommend replacing your old batteries with these rather than buying a new shaver, if you liked your old one. (Posted on 12/20/2016)

Fast service and delivery. No install problems, Work great (Posted on 10/4/2015)

Shaver works like a new after replacing both batteries. (Posted on 9/26/2015)

These batteries were as easy as possible to install because of the solder tabs. When I turned the razor on it has more power than I remembered when it was brand new. (Posted on 9/24/2015)

Replaced 2 1000 maH with 1500 maH Ni-MH batteries. Works great! Shaver runs faster & it holds charge longer.

Thank you. (Posted on 1/16/2015)

Size was perfect. So far they seem to recharge fine and work great. (Posted on 1/1/2015)