Battery Maintainer/Battery Tender
Thread Starter
Race Director
Joined: Jan 2006
Posts: 11,605
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St. Jude Donor '11-'12-'13-'14-'15-'16-'17
Battery Maintainer/Battery Tender
I have Schumacker SE-1-12S Fully Automatic/Onboard tender. I never get the "red" light showing charged but the Green light is lit. I check the vehicle in storage every two weeks or so by putting a trickle charger on it. The draw jumps immediately to 6 amps and slowly charges the battery over 12 hours or so.
I checked the output (DC) on the Schumacker and can't get anything but a mv reading indicating that there is no output. Obviously it's not working. Am I doing this correctly? Any advice?
I checked the output (DC) on the Schumacker and can't get anything but a mv reading indicating that there is no output. Obviously it's not working. Am I doing this correctly? Any advice?
Racer
Joined: Dec 2001
Posts: 452
Likes: 2
From: Lynnfield MA
I have Schumacker SE-1-12S Fully Automatic/Onboard tender. I never get the "red" light showing charged but the Green light is lit. I check the vehicle in storage every two weeks or so by putting a trickle charger on it. The draw jumps immediately to 6 amps and slowly charges the battery over 12 hours or so.
I checked the output (DC) on the Schumacker and can't get anything but a mv reading indicating that there is no output. Obviously it's not working. Am I doing this correctly? Any advice?
I checked the output (DC) on the Schumacker and can't get anything but a mv reading indicating that there is no output. Obviously it's not working. Am I doing this correctly? Any advice?
I'm not sure how you're checking the output on the Schumacker,
since you can't put a meter on a battery tender and get a reading
that means anything. But clearly, if another tender shows activity,
the Schumacker isn't doing its job.
I use a 1.5amp automatic tender, and it will definitely go into
"float" mode overnight (showing that the battery is charged).
The float light will occasionally go out and then come back on
a few minutes later, but that can be expected.
Sounds like you need a new tender.
Thread Starter
Race Director
Joined: Jan 2006
Posts: 11,605
Likes: 1
St. Jude Donor '11-'12-'13-'14-'15-'16-'17
I'm not sure how you're checking the output on the Schumacker,
since you can't put a meter on a battery tender and get a reading
that means anything. But clearly, if another tender shows activity,
the Schumacker isn't doing its job.
I use a 1.5amp automatic tender, and it will definitely go into
"float" mode overnight (showing that the battery is charged).
The float light will occasionally go out and then come back on
a few minutes later, but that can be expected.
Sounds like you need a new tender.
since you can't put a meter on a battery tender and get a reading
that means anything. But clearly, if another tender shows activity,
the Schumacker isn't doing its job.
I use a 1.5amp automatic tender, and it will definitely go into
"float" mode overnight (showing that the battery is charged).
The float light will occasionally go out and then come back on
a few minutes later, but that can be expected.
Sounds like you need a new tender.
I'm measuring with a tester set to DC. It shows a -m.v. draw. You're right though. The proof is that the battery goes almost dead and re-charges as necessary with a trickle charger. We'll see what Murray's says when I bring it back.
