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Old 10-28-2018, 11:55 AM   #1
Dannyx
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Question What are these battries ?

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Good day folks. Nice and straightforward here: my Braun electric shaver which I've used for the past 5-6 years could definitely do with some new batteries since they're on the wane after such a long time and I feel the need to recharge it a lot more often.

After a lot of effort, since it's waterproof and sealed very tightly, I managed to finally crack the shaver open and get to the batteries buried deep inside. Being that it's a fairly modern device, I was expecting to find a lithium battery in there, but instead I was met by THESE....I though "ok, simple enough. AA NiMh batteries, but then I had a closer look at them and there's a catch: literally, there's a catch at each end They're the most bizarre things ever and as far as I'm concerned they may very well exist in just this one device only. The cell has got two little nipples at each end which engage with some clips in the holder to hold the batteries and also make contact. Outside of that, they're identical in size to AA batteries, but I just couldn't come up with a good (enough) idea of holding them in there, because there's no springs like in normal AA holders - they rely solely on those metal "snaps" to hold them in there, so a regular AA would just fall out, even though I'm sure it would work just fine electrically. I was thinking of shoehorning a washer or something in there, but it wouldn't stay put...my local electronics store WAS able to identify these cells and source them for me, but the price was rather high and I wasn't sure it was worth it, so I thought I'd do some digging on my own. There's no specs on them either (as far as I remember at least, because I don't seem to have taken any pictures all around the label and I'm only assuming that's because there was no info in those areas).

Any ideas as to what these are ? I HATE it when they do stuff like this just to force you to throw away a perfectly good device. I CAN use it with the adapter, but what's the point ? I don't have an outlet in my bathroom and certainly don't want to lug an extension cord with me when I travel....damn crooks :|
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Last edited by Dannyx; 10-28-2018 at 01:13 PM..
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Old 10-28-2018, 01:25 PM   #2
SMDFlea
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Default Re: What are these battries ?

You could try a stainless steel rivet,riveted through a washer ,then solder it on .
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Old 10-28-2018, 01:26 PM   #3
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Default Re: What are these battries ?

You mean solder it to the batteries ? Wouldn't that be *ahem* "not recommended" ?
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Old 10-28-2018, 01:49 PM   #4
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Default Re: What are these battries ?

Its ok if you don`t leave the soldering iron on it too long, and do the soldering in a safe place and take a few precautions.
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Old 10-28-2018, 02:04 PM   #5
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Default Re: What are these battries ?

Meh... you could just just get a AAA rechargeable battery and solder wires to each end and inside the device.

700mAh vs 1500-2000mAh ... it will have long enough charge to last a shave.
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Old 10-28-2018, 02:05 PM   #6
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Default Re: What are these battries ?

I could do the same with AAs then...even better. All I care about is capacity and not having to recharge them so often.
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Old 10-28-2018, 03:29 PM   #7
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Default Re: What are these battries ?

I haven't seen those oddball battery pins before. I would try pry them off, they don't look spot-welded.

For my shavers, I solder wires on AA Eneloop Pro 2,500mA batteries.
Just use flux, pre-solder the wire ends and use the least heat possible, do it quickly to not melt the internal seal.
The shaver has been great, maybe too good. New battery internal resistance must be lower or because I oiled/greased it up. It runs must faster so I added a little resistor to slow it down- shaver burn hurts. Who needs 7,000RPM?

Older Brauns have a "poison pill" so that you can't reuse the shaver after opening the case. A metal pin falls down and jams the cord-jack so you can't use it

Last edited by redwire; 10-28-2018 at 03:30 PM..
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Old 10-28-2018, 03:46 PM   #8
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Default Re: What are these battries ?

The one I got (thankfully) only gave me a hard time opening it because of some very tough clips, but other than that there's no "anti-servicing" mechanism.

It also uses a constant current circuit (?), so no matter how high the input voltage is, the motor always runs at a constant velocity. Conversely, when the battery is low, it still runs smoothly and you never actually hear it getting slower. There's a battery monitoring circuit in there which just shuts it off and prevents you from turning it on again until you charge it when the battery gets too low (a red LED also flashes to indicate why it wouldn't turn on). It's been doing this a lot recently: in between passes, when I stop to rinse my face, the shaver would suddenly decide it's had enough and wouldn't turn back on again, even though it wasn't showing any signs of slowing down a second ago, so I have to trick it by briefly plugging in the charger and then going back to the washroom to pick up where I left off....
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Old 10-28-2018, 05:59 PM   #9
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Default Re: What are these battries ?

Do you have or someone that has a battery spot welder you just need to remove the button on the old battery and reuse them with the new battery and you can use AA Eneloop Pro 2,500mA batteries or any good quality batteries
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Old 10-28-2018, 06:22 PM   #10
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Default Re: What are these battries ?

pull nipples off old ones then place onto new ones ..might not even need soldering or welding .
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Old 10-28-2018, 07:34 PM   #11
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Default Re: What are these battries ?

Quote:
Originally Posted by redwire View Post
For my shavers, I solder wires on AA Eneloop Pro 2,500mA batteries.
same, but i get my loops from ikea - rebranded:LADDA
they are half the price!
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Old 10-28-2018, 07:39 PM   #12
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Default Re: What are these battries ?

grow a beard ...
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Old 10-28-2018, 10:52 PM   #13
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Default Re: What are these battries ?

That looks like the replacement I used in my Panasonic ES8243 shaver

Got it from www.akku-wechsel.de

Mine seems to be a standard 14500 with the extra nipple each end

I'm now using the original battery, with nipples removed, in a flashlight which uses a 14500
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Old 10-29-2018, 06:57 AM   #14
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Default Re: What are these battries ?

14500 is a lithium code, these are NiMH.
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Old 10-29-2018, 07:44 AM   #15
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Default Re: What are these battries ?

https://www.fix.com/parts/shaver-raz...C-aa-67030923/
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Old 10-29-2018, 07:45 AM   #16
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Default Re: What are these battries ?

https://www.aliexpress.com/item/Orig...571562600.html
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Old 10-29-2018, 08:24 AM   #17
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Thumbs up Re: What are these battries ?

Quote:
Originally Posted by petehall347 View Post
There you go....the prices are STILL too high, so I'd be better off hacking something with some more "reasonably" priced NiMhs.....
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Old 10-29-2018, 10:48 AM   #18
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Default Re: What are these battries ?

go to ikea.
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Old 10-29-2018, 10:50 AM   #19
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Default Re: What are these battries ?

Quote:
Originally Posted by stj View Post
same, but i get my loops from ikea - rebranded:LADDA
they are half the price!
Ikea Ladda 2450mAh are $2.50 ea. in Canada and 34,90 lei/4-pack in Romania. I don't see them for sale at Ikea USA. I'll give them a try.
I get Eneloops on sale with the charger kit (about twice the price $5 ea.) so now I have a million chargers lying around.

Men's shavers are such junk now, it makes sense to repair them.
Braun's shavers MSRP over $300 now, $60-$70 for blades and the foils
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Old 10-29-2018, 10:58 AM   #20
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Default Re: What are these battries ?

yea, shavers are the new dyson vac cleaner as far as prices are concerned!!

what pisses me off is they cost so much and they still put low capacity cells in them.
phillips use 700mA cells in AA format.
wtf - the weakest loops are 1000mA i think.
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