Trickle charger passthrough - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

aa_chow · 04-05-2020, 05:52 PM

With COVID-19, unfortunately I had to put the car to hibernate as I don't get to drive it.

First time hooking up my FR-S to a trickle charger, and "discovered" (don't know if it's known to folks here, but nothing came up when searched) a notch/pass-through in the plastic area just above the battery, on the passenger side under the wipers. See attached pictures.

soundman98 · 04-05-2020, 05:58 PM

it's got a fused lead closest to the battery on the trickle charger? that makes me scared for reasons i can't explain.. you always fuse the SOURCE, not the DEVICE...

Grady · 04-05-2020, 07:29 PM

Quote:

Originally Posted by soundman98

it's got a fused lead closest to the battery on the trickle charger? that makes me scared for reasons i can't explain.. you always fuse the SOURCE, not the DEVICE...

The source is the battery! The charger is internally protected, you need protection from shorting the battery.

Irace86.2.0 · 04-05-2020, 07:30 PM

Quote:

Originally Posted by aa_chow

With COVID-19, unfortunately I had to put the car to hibernate as I don't get to drive it.

First time hooking up my FR-S to a trickle charger, and "discovered" (don't know if it's known to folks here, but nothing came up when searched) a notch/pass-through in the plastic area just above the battery, on the passenger side under the wipers. See attached pictures.

I don't think I ever noticed that.

soundman98 · 04-05-2020, 07:43 PM

Quote:

Originally Posted by Grady

The source is the battery! The charger is internally protected, you need protection from shorting the battery.

No, with a charger/maintainer, the source is the wall outlet.

Unless you're powering your house from the battery

ls1ac · 04-05-2020, 08:22 PM

I hope it is a maintainer with smarts and not a simple trickle charger.

aa_chow · 04-05-2020, 09:05 PM

Quote:

Originally Posted by ls1ac

I hope it is a maintainer with smarts and not a simple trickle charger.

Yes, it’s fully automatic.

Sent from my iPad using Tapatalk

Grady · 04-06-2020, 10:13 AM

Quote:

Originally Posted by soundman98

No, with a charger/maintainer, the source is the wall outlet.

Unless you're powering your house from the battery

Those pigtails are designed to be left on the battery. The battery is a larger power source than the wall charger. Look at it this way, Everything is plugged in, short the 2 wires together, Where is the damaging current going to come from? About 2A from the charger, not enough to damage the wires, (Plus if it is a good charger it will be circuit protected) About 350A from the battery. That will smoke those wires in seconds. This is why the fuse is and needs to be close to the battery.

Lim · 04-06-2020, 11:26 AM

What other people do?
I went yesterday and my car barely started after 6 days of standing at parking lot.
I don't have option to put external charger.

Do you need to drive it around once in a while?

I started my Subaru legacy without any issue with a good crank. Looks like FRS keep using battery a bit more. Is there way to limit use without disconnecting battery all together?

DarkSunrise · 04-06-2020, 11:40 AM

Quote:

Originally Posted by Lim

What other people do?
I went yesterday and my car barely started after 6 days of standing at parking lot.
I don't have option to put external charger.

Do you need to drive it around once in a while?

I started my Subaru legacy without any issue with a good crank. Looks like FRS keep using battery a bit more. Is there way to limit use without disconnecting battery all together?

I'd try testing your battery to see if it's still good. A lot of the chain auto stores will test your battery for free.

ls1ac · 04-06-2020, 11:46 AM

You can use a battery disconnect switch when parking for a while, But remember the car will have to relearn setting when you restart. An other option is a small solar charger, run the wire out the back of the hood and in the door to the dash. I use one on a boat during the summer. I used to use one on a tractor before I got power to the barn.

Grady · 04-06-2020, 12:59 PM

Quote:

Originally Posted by Lim

What other people do?
I went yesterday and my car barely started after 6 days of standing at parking lot.
I don't have option to put external charger.

Do you need to drive it around once in a while?

I started my Subaru legacy without any issue with a good crank. Looks like FRS keep using battery a bit more. Is there way to limit use without disconnecting battery all together?

Solar battery maintainer will work also.

joro2 · 04-06-2020, 02:52 PM

Quote:

Originally Posted by aa_chow

notch/pass-through in the plastic area just above the battery, on the passenger side under the wipers. See attached pictures.

Thanks

Never noticed that pass thru before either.

What brand/model tender/maintainer are you guys using?

I’ve also noticed my relatively new/OEM BRZ battery does not like sitting idle for even short periods of time; 2 weeks max after which I’ve experienced pretty heavy degradation/drain.
15-20 miles continuous driving tops it back up, but like everyone else on the planet right now.... COVID.

Tender / charger suggestions welcome.

Sapphireho · 04-06-2020, 03:13 PM

Quote:

Originally Posted by joro2

Tender / charger suggestions welcome.

I use Duracell Ultra maintainers. I have 1.5 and .8 amp, both are good for maintaining. I use the 1.5s on standard batt, and .8 on tiny race batt.

And the best little battery charger I've ever had had been the Schumacher. Small, lite,does all kinds of batts, and cords fit inside when not in use.

04-05-2020, 05:52 PM	#1
aa_chow Senior Member Join Date: Jun 2015 Drives: 2015 FR-S, 2020 Mazda 3 Sport Location: Ontario, Canada Posts: 190 Thanks: 38 Thanked 65 Times in 43 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Trickle charger passthrough With COVID-19, unfortunately I had to put the car to hibernate as I don't get to drive it. First time hooking up my FR-S to a trickle charger, and "discovered" (don't know if it's known to folks here, but nothing came up when searched) a notch/pass-through in the plastic area just above the battery, on the passenger side under the wipers. See attached pictures. Last edited by aa_chow; 05-03-2020 at 11:21 PM.

04-05-2020, 05:58 PM	#2
soundman98 ProCrastinationConsultant Join Date: Sep 2013 Drives: '14 Ranger, '18 Tacoma 4Dr LB Location: chicago-ish Posts: 11,330 Thanks: 35,240 Thanked 13,673 Times in 6,781 Posts Mentioned: 98 Post(s) Tagged: 0 Thread(s)	it's got a fused lead closest to the battery on the trickle charger? that makes me scared for reasons i can't explain.. you always fuse the SOURCE, not the DEVICE... __________________ "The time you enjoy wasting is not wasted time"

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04-06-2020, 11:26 AM	#9
Lim Member Join Date: Sep 2018 Drives: Scion FRS 2016 Location: Toronto Posts: 30 Thanks: 5 Thanked 19 Times in 12 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	What other people do? I went yesterday and my car barely started after 6 days of standing at parking lot. I don't have option to put external charger. Do you need to drive it around once in a while? I started my Subaru legacy without any issue with a good crank. Looks like FRS keep using battery a bit more. Is there way to limit use without disconnecting battery all together?

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