Few days ago tried to start my M1100evo and it didn't start . Put a multimeter on the jumper cable that comes out from the battery (for battery tenders, chargers, gps,etc) it was showing 0V.... So obviously the fuse was blown.... It was a mission to get to the battery ,anyways got there . started checking everything .. my battery tester was showing 54F , 12.5V , low current for ampers.... Checked the charger and it turned out that the polarities were reversed by some genius ex friend I had ... And when i connected didn't pay attention... So I reversed them back to normal charged it for 24 hours . Started the bike everything seemed normal.. so i let it sit for 5 days in my garage temp. 30F and below .. right now got back to connect the new battery tender I bought .. before connecting I measured it with my battery tester (50F,12V, 1,5ah) however the battery from my M750 which is disconnected from the bike and has been seating for the same amount of time measured (54F , 12V , 6,5ah)
Don't like the amperage on the M1100... Does it draw a lot while seating ?? Is there any computer or device in there that draws power ??
How are you getting this amperage reading?
Quote from: howie on February 08, 2013, 10:07:58 PM
How are you getting this amperage reading?
I have a battery tester . Not multimeter*
The reason I am asking is a load has to be applied to get an amperage reading, even then you are reading voltage with the load applied. Usually the ones used in motorcycle shops are a fixed load, more deluxe is a variable load, where you apply 3X the amp hour rating or 1/2 the cold cranking amps for 15 seconds, depending on the info available on the battery. New, well, actually not so new but still not common are testers that determine the resistance to AC current to determine battery condition and usually read in voltage and cold cranking amps. These tend to be pricy for the DIYer. Info on this tester would be useful, both to help you and us.
Anyway, yes, your Evo draws more than your 750, but should not discharge the battery that quickly. You may simply have a bad battery or drain might be excessive. Since I don't know how you are testing your battery I will leave that for now To test for drain on your modern Evo hook an ammeter in series with battery negative. On the milliamp scale you should be reading 50 milliamps or less. If you are reading more than 50 milliamps pull the fuses one at a time. That will tell you which circuit is draining the battery.
this is the battery tester im using...
(http://sphotos-b.xx.fbcdn.net/hphotos-frc1/860033_10152564806045113_707102579_o.jpg)
went today to check the batteries and tested them with this tester... (they've been on battery tender for the past two days)
and what i realized was that if i test the battery straight up from the terminals, i get a 10ah. reading ...
however if i test it from the jumper i have which is 7.5ah fused i get 3.4ah. (that was from the M750) battery . haven't tested the M1100 yet since its hard to get to it.
i think that fused jumper wire makes the difference ..
Interesting, seems to be a legitimate product. I'm guessing it works on AC resistance. Maybe our friends across the pond can chime in. If so, yes, the lead will have an effect.