Question about Schumacher 10 Amp Fully Automatic/Manual Charger by

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Battery charger- schumacher se 4020

I have a schumacher se-4020. My plastic knob (position) broke off. Does anybody knows where to buy one? Thank you for your help.Peter

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  • Anonymous Mar 14, 2014

    schumacher se-2001 wiring diagram

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Needle jumps back an forth between charging and charged.


Did you try it on a different battery? These automatic chargers won't charge unless they detect a little bit of voltage and not a direct short. Your battery might be shorted out. Good luck, Al K

May 22, 2011 | Schumacher 10 Amp Fully Automatic/Manual...

1 Answer

I am trying to charge my cars battery but I am not sure where to put the 3 way switch.


Best solution is to use the Auto mode, since the unit will monitor the battery, and automatically switch to trickle charge when the battery is full. In the Auto mode, it won't overcharge the battery.

Feb 28, 2011 | Schumacher 10 Amp Fully Automatic/Manual...

2 Answers

Looking for wirring diagram for schmacher SE-1275A battery charger. Wires got pulled out of component need to know where white wire & black wire goes.


yay I emailed schumacher asking about this and they got bak to me within 12 hours or so with EXACTLY what I needed

I looked a long, long time without finding anything like this online, and many different people asking the same questions

so please save this picture for your records, and if you have a minute, go post it on an unanswered schumacher battery charger wiring diagram question

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Jan 18, 2011 | Schumacher DSR ProSeries Battery Charger -...

1 Answer

We have no instructions for our charger can you please tell me how to use it?


your car battery has two connections called posts. one is negative and one is positive +. the red clamp from your charger goes to the positive terminal on the battery. the black clamp is supposed to go to ground, like an unpainted bolt but not brake lines or any kind of tube. It can be hooked to the negative or black battery connection as well. just make sure there is plenty of airflow around the battery and you should be fine. I usually do it that way and have never had a problem.. finally set your charger for 10 amps on a 12 volt battery and plug it in.

Aug 20, 2010 | Schumacher 10 Amp Fully Automatic/Manual...

2 Answers

Is the 10 amp se-40ma battery charger to big for my motorcycle battery can it over heat or over charge it


A battery that might sit for a month at a time, would only need a trickle charge or about 1 amp, a charger of this type can stay hooked to the battery for the whole month. A 10 amp would be for a quick charge or only about 4 - 12 hours depends on how fast the battery lost the charge. A 10 amp charge would cook the battery if left for days.

Mar 26, 2010 | Schumacher 10 Amp Fully Automatic/Manual...

1 Answer

THE TIMER ON MY MODEL SE-3612 WILL NOT SHUT OFF


go to the intermatic timer site and search for a replacement timer. have you tried the site of the manufacturer?

Oct 13, 2009 | Schumacher DSR ProSeries Battery Charger -...

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