bad at math question

[Eric L]

if i have a device that draws 10 mA do I need to have it switched or can it run for a day or week or longer without affecting the battery charge?

I should be able to figure this out.... but alas that particular set of neurons have died.

 

[Twigg]

A 10 milli-amp draw would take quite a long time to reduce a 12 AmpHr battery to 50%

You will be fine. As a good habit, connect your bike to a battery tender if it is to be left for more than about 7 days.

Doing the math is complicated because the discharge rate in not linear, and depends on temp, rate of draw, age of battery and a bunch of other stuff.

Briefly though, a 100 milliamp draw would reduce the battery to 50% in approximately 60 hours .... Your draw would do the same in 600 hours.

 

[Teehaml]

...but alas that particular set of neurons have died.

Oh boy... I can relate to that.

 

[Eric L]

Thanks Twigg,

You know, I've never let my bike sit as long as a week before, but this winter really is the shitz. snow, salt, subzero, ice, repeat.

 

[Lowcountry Joe]

+1 on the battery maintainer. A 10 mA draw is very light, yet still a draw. I use the Schumacher XM1-5 maintainer from Walmart. It's about $25 and comes with all of the pig tails and other clip connections you will ever need. I use them on my bikes and on my large electric start generator's battery.

https://www.walmart.com/ip/15140193?wmlspartner=wlpa&adid=22222222227009517295&wl0=&wl1=g&wl2=c&wl3=40839225752&wl4=&wl5=pla&wl6=52987237166&veh=sem

 

[RichDoyle]

600 hours=25 days, or about 3-1/2 weeks.