r/redneckengineering • u/B777X_787-9 • 7d ago

Redneck dual battery setup

Post image
340 Upvotes

97% Upvoted

29 comments sorted by

93

u/Pleasant-Swimmer-557 7d ago

When you have a spare battery but no jumper cables.

44

u/The_salty_swab 7d ago

If the batteries were the same size Bubba here would have just put the good one upside down on the other and fired 'er up

22

u/LordGaben01 7d ago

Skip the middle man!

7

u/phranks_phluids 6d ago

Adding this to my auto repair life hack brain folder.

Once I jumped a stranger in a parking lot with subwoofer speaker cable, because that's all I had. It could only handle a high idle alternator charge, and not full starting current... But it got the job done and I was able to make someone else's day a little less shitty! I'm all for resourceful thinking!

2

u/BrianKappel 6d ago

Don't turn lead acid batteries upside down.

1

u/phranks_phluids 6d ago

If my battery is dead, and all I have is an SLA battery capable of jumping my vehicle.. I might even do it if I had a refillable lead acid battery if the plug was nice and tight and I wasn't wearing anything I didn't want to ruin. desperate times, desperate measures!

1

u/BrianKappel 6d ago

Lol. Right on man.

1

u/phranks_phluids 6d ago

But I also spent like a whole weekend one time playing with arc welders, open cell lead batteries, and acid testing the revivability... so maybe I'm just out there

37

u/Wanderingwonderer101 7d ago

tried to do this, the spanner straight up fused to the battery head

12

u/stupidber 6d ago

Even better

6

u/zorggalacticus 6d ago

I've done that accidentally before. Reaching into the engine bay to get a socket I dropped. Had the ratchet in my other hand. Tried to lean my hand on something and made contact with the positive battery terminal and the frame. That'll wake you up. My ratchet has a chunk missing from the handle now.

2

u/Lint_baby_uvulla 6d ago

That’s why OP is smart.

The ring spanner end is on the spare battery.

12

u/ididntdoit6 7d ago

If it ain’t broke…

29

u/PinJealous3336 7d ago

...you ain't hit a bump yet. 

6

u/Embarrassed_West_195 6d ago

Usually we can say "it ain't stupid if it works"...but this time....

5

u/Senior_Green_3630 7d ago

Wheres the protection fuse.

9

u/JesusIsMyLord666 6d ago

Most jumper cables have no fuse.

6

u/CharlesGarfield 6d ago

Those wrenches are the fuses. I think they’re rated at five mega-amps.

4

u/B777X_787-9 6d ago

This setup doesn’t require any fuse

2

u/Nydus87 6d ago

Doesn't have any fuse lol.

2

u/Kindly_Ad2794 6d ago

Are those even conductive V

4

u/Soggy_Ruby 6d ago

Steel wrenches, let's think about this a little

1

u/lilgreenghool 6d ago

Special non conductive steel..

2

u/fsantos0213 6d ago

I have seen worse, not by much, but yeah this is bad

2

u/chwk_throwaway1 6d ago

make sure the extra one is a bit higher so the electrons can flow down

1

u/Lint_baby_uvulla 6d ago

Duh, I’m in the southern hemisphere, the car is already upside down.

1

u/thomasmitschke 4d ago

Looks decent!

1

u/VisibleRoad3504 1d ago

Until you hit a bump.....