Car Battery is always draining - Fixing it with a Battery Isolator (Remote Kill Switch)

#noexpert #diyprojects #carrepair #electronics
In this video I show you how I dealt with the problem that my car battery is always draining. I know car batteries have a hard time in winter, because they need to deliver high amounts of current while they are not at a good operating temperature. But in this case it’s different.
Even when I charged my car battery, after a few days it is always dead. The voltage drops so low that it might cause permanent damage, but I don’t want to get a replacement just so it can get drained again. Something in the system is just not working and I suspect there is a leaking current somewhere, which is so low that it won’t trigger a fuse but so high that it drains my battery after 3 to 4 days.
In order to tackle this problem, I could get a full inspection on the car wiring but that takes a lot of time and is super expensive if done by a professional. Also it’s kind of urgent because I need to get to university and work and it’s so cold that my scooters throttle froze. So for a few days, I just unplugged the battery but it quickly became annoying. Thats why I wanted to have a better solution and got this 12 Volt remote controlled kill switch that completely disconnects the battery at the press of a button.
Timestamps
00:00 Intro
00:10 Battery is flat
00:40 Pulse Repair Charging
01:01 Remote Relay Switch
01:57 Cutting the starter cable
02:23 Installing the Circuit breaker
02:44 Test 1
03:05 Rough estimation for power consumption
04:02 Test 2
04:14 Test 3 - Starting the car
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[@Ecne3D]

thanks for showing what's inside :)

[@Ecne3D]

hmm but what's the power draw with it ON, so if you forget to disconnect the battery, the electromagnet will drain the battery?

[@gabe4408]

will this work for a starter kill switch ?

[@zzwooly3331]

Will this cause problems in the long term?

[@no-expert]

I’ve had it installed for a year now and it still works fine, didn’t even have to change the battery on the remote. For me it saved a lot of headache because now I know my battery is always full and my car can start. In everyday life nothing changed except that I need to press an extra button. The only problem I see is that when the remote is empty one day, I can’t start the car - but I’ve got a second one. Apart from that it’s just a switch, it can’t damage the car. It’s like unplugging your TV instead of putting it into standby. One thing to keep in mind is that the remote lock/unlock and the alarm system won’t work if you completely disconnect the battery like this. But then again, a thief couldn’t start it either until he figures out what’s going on :D

[@zzwooly3331]

@@no-expert that’s the problem I ordered my disconnect switch with remote control from FEITON and it doesn’t come with a spare remote control. I don’t even know how to contact them for a spare remote control

[@no-expert]

In this case, I would put a replacement battery in your car, wallet or backpack so you always have one with you. Also take jumper cables with you (which you probably already have with you if you’ve got battery problems like me).
In the case you lost the remote or the remote battery is empty you can always bypass the relay using one jumper cable, connected in the front and back of the relay. Like this you should be able to start your car even without the remote :)

[@bondholder604]

I put one on, but it does not completely cut the power off, still drains the battery what a pos..

[@no-expert]

What, that's strange. Sounds like a case for warranty :D

[@yunusertas]

so where we can found this relay?

[@dustysrandom5079]

Amazon or eBay. $25 usd

[@VJLee-sx1ix]

is your car desiel?

[@no-expert]

No it's petrol, but this should work for diesel too. Just make sure to activate it for pre glow before starting :)