I'll try that




I'll try that when the E300 is road worthy, needs 4 tires and a windshield wiper.

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1998 Ford Escort ZX2 5 speed - 279,000 miles My Daily

1992 Mercedes 300D 2.5 202,000 - Pure junk
2000 Mercedes E320 Black - 136,000 miles - Needs repair

Don't forget to grease the screw and threads on the spring compressor.

If the battery was severely discharged and then sat that way for awhile, especially if it was an older battery to begin with, it may indeed now be faulty dead, gas tank has a hole dead.

Lead acids don't like sitting discharged at all, not even over night, every second spent discharged is damage being done. Recharge as soon as possible to prevent damage.

You can certainly use jumper cables off a running vehicle to charge a dead battery. My understanding is that most automotive alternators won't tolerate running at full output for extended periods of time, they don't have enough cooling capacity built in. Recharge a very lightly depleted SLI battery in a few seconds or a couple minutes sure, WOT output for an hour + not so much. In a pinch I'd do it but keep an eye on things and don't make a regular practice of it. Semi truck alternators, which generally aren't much higher output than normal automotive alternators but are designed for continuous output, are ~3x the size of a auto alternator.

Good luck, FoG. I don't know your situation and don't want to offer unsolicited advice, instead I'll share my own experience. Moving out on my own and only having my own bull**** to deal with and no one else's was the single biggest and most positive change I ever made in my life. I'll live in my truck in a Walmart parking lot before I'll deal with that again.

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617 swapped Toyota Pickup, 22-24 MPG, 50k miles on swap

Try putting 1/4 teaspoon of epsom salts into each cell, then charge. Be sure H20 is topped off as well. If that does not work , its toast. I have rescued dead batteries that way a few times with success. Some lasted for years after the treatment. I am currently running one in my truck with no issues. I'm not sure I would drive to Tahoe or somewhere very cold with it. Of course, the sealed batteries wont work.

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Chris
84 280sl
82 300d euro

Also, it looks like H8's are ~$120 at Walmart. Probably not the greatest battery, but also probably the same Johnson Controls battery you'll find at most other retailers in the area.

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617 swapped Toyota Pickup, 22-24 MPG, 50k miles on swap

In my area walmart it isn't Johnson controls.

I'll just buy a Duralast Gold, my brother however put the walmart Battery in the SDL, so far so good.


Dang, GOING to do this tomorrow lol


Looking at this, if you drain, fill, and cycle your battery every six months will it last forever?

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1998 Ford Escort ZX2 5 speed - 279,000 miles My Daily

1992 Mercedes 300D 2.5 202,000 - Pure junk
2000 Mercedes E320 Black - 136,000 miles - Needs repair

Don't forget to grease the screw and threads on the spring compressor.

Who would have thunk it??????


https://www.youtube.com/watch?v=AcE7ErS-Pl8

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96 E300d

You can charge the battery this way.


It will probably take 15-30 minutes to provide a full charge. Your alternator works like a 40-75 amp charger while it's powering other things. Don't use the alternator to charge the battery for too long, especially if you also have your battery attached. Batteries with inequal voltages can sometimes cause problems with sophisticated voltage regulators. That's why the sophisticated ones aren't used in older motor homes.


But check Craig'slist. Battery chargers often sell for 20 bucks there.

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Strelnik
Invest in America: Buy a Congressman!

1950 170SD
1951 Citroen 11BN
1953 Citroen 11BNF limo
1953 220a project
1959 180D
1960 190D
1960 Borgward Isabella TS 2dr
1983 240D daily driver
1983 380SL
1990 350SDL daily driver alt
3 x Citroen DS21M, down from 5
3 x Citroen 2CV, down from 6

the 20 dollar 3.0A everlast battery maintainer from walmart works good. It wont charge a battery lower than 11.1V (it will just error out). Once it reaches full capacity (also visible on screen), it will automatically go to float charge mode.

As SL320 said, just put the battery in the trunk with your other battery and connect some wiring (not too large) and drive it around, it will charge.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)

You might even use as much as a teaspoon of the salts per cell . You can dissolve the Mgso4 in the water if that makes it easier. I did not do an exact amount. I would slow charge. You can only do the salts once or twice, in my experience. It gives you another round, which can last. Usually, when the battery gets drained completely again, it will be dead.

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Chris
84 280sl
82 300d euro