BMW K bikes (Bricks)

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1Back to top Go down   BMW Battery Charger Empty BMW Battery Charger Sun Mar 06, 2022 1:21 am

jjefferies

jjefferies
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At one point BMW was including a 3 amp battery charger with the purchase of a new BMW motorcycle. I'm now an owner of two of these gems/relics and I don't remember the selling points. They look to be fairly good quality. But does anyone remember are they just straight battery chargers? Or did they have any thing like a trickle charger mode? Some time ago I was under the impression there was an issue with over charging if you left them on like a trickle charger. Here's a photo

BMW Battery Charger Bmw_ba10

    

2Back to top Go down   BMW Battery Charger Empty Re: BMW Battery Charger Sun Mar 06, 2022 3:23 am

RicK G

RicK G
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A charger of that vintage would not have a maintenance charger feature. It would be 3 amps or nothing.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 2004 K1200GT 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

3Back to top Go down   BMW Battery Charger Empty Re: BMW Battery Charger Sun Mar 06, 2022 5:07 am

Snashall

Snashall
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JJeferies, Is it 110 or 240volt powered?  If 240volt are you interested in selling one?  Cheers, Alan in Oz

    

4Back to top Go down   BMW Battery Charger Empty Re: BMW Battery Charger Sun Mar 06, 2022 10:52 am

Dai

Dai
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What Rick says. The output will be completely uncontrolled.


__________________________________________________
1983 K100 upgraded to K100RS spec, 1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

5Back to top Go down   BMW Battery Charger Empty Re: BMW Battery Charger Sun Mar 06, 2022 12:21 pm

Shep

Shep
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A neat heritage item that would enhance a person's shop (provided they have room).
If supplied to the North American market the input should be 110 -115 V ac.
The output if the unit is not too old should be 12 V but perhaps it has a 6 volt output as well!
Unique item.

P.S. The picture clearly shows 120 V ac input and only a 12 V dc output . As well it shows that it was made in the USA.



Last edited by Shep on Sun Mar 06, 2022 12:26 pm; edited 1 time in total (Reason for editing : Did not look at the photograph as closely as I should have.)


__________________________________________________
Model        Production Date/Serial Number
K100RS      1984 July/ (F0040448)
K100RS      1986 Dec/ (H0142581)
    

6Back to top Go down   BMW Battery Charger Empty Re: BMW Battery Charger Sun Mar 06, 2022 12:58 pm

Two Wheels Better

Two Wheels Better
Moderator
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Those old units are straight charge, 120Vac and 3 amps continuous output - as it says clearly on the front label. No pulse charge for anti-sulphation of FLA, AGM and the like, but ideal - somewhat ironically - for lithium ion batteries if you only use them for a few minutes to verify the condition of the battery. These were the bomb from the late 1970s through the early '90s. The part numbers, BMWNA 'accessory' numbers, 95 61 1 250 700 & ...800, were discontinued long ago.

There are a few listed on eBay...

US eBay BMW charger

eBay US BMW charger

Charger BMW US eBay


__________________________________________________

1970 R60/5, '77 R75/7-R100, '85 K100'87 K75C, '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R'04 R1150RT, '05 K1200S, '06 K1200R, '07 K1200R, '09 K1300GT, 2013 R1200RT-P & 2022 S1000XR



"We take our bearings, daily, from others. To be sane is, to a great extent, to be sociable."

~John Updike.
    

7Back to top Go down   BMW Battery Charger Empty Re: BMW Battery Charger Sun Mar 06, 2022 6:32 pm

Laitch

Laitch
Life time member
Life time member
jjefferies wrote:. . . I don't remember the selling points. They look to be fairly good quality. But does anyone remember are they just straight battery chargers? 
The selling point was that it would charge the battery if the battery hadn't been discharged so frequently that the battery was ruined. Attach the cables, plug in the charger then unplug it when the needle quit descending the scale. The downside was that if attention wasn't paid to a timely unplugging, overcharging could happen. It worked fairly well for many of us in an era when our attention wasn't distracted as much as it can be today.  BMW Battery Charger 177381


__________________________________________________
1995 K75 81,000 miles
BMW Battery Charger Usa-lo10
    

8Back to top Go down   BMW Battery Charger Empty Re: BMW Battery Charger Sun Mar 06, 2022 9:24 pm

jjefferies

jjefferies
Life time member
Life time member
RicK G wrote:A charger of that vintage would not have a maintenance charger feature. It would be 3 amps or nothing.
Well, actually that's sort of what lead to the question. The meter on the front shows the charge rate decreasing until it's just showing. And I vaguely remember someone years ago complaining about leaving one on all winter and having unexpected results.

I assume they're usable as chargers.

    

9Back to top Go down   BMW Battery Charger Empty Re: BMW Battery Charger Sun Mar 06, 2022 9:25 pm

jjefferies

jjefferies
Life time member
Life time member
Snashall wrote:JJeferies, Is it 110 or 240volt powered?  If 240volt are you interested in selling one?  Cheers, Alan in Oz
They'd probably like the environment. Unfortunately they both specify 120volt input for 12 volt output.

    

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