How to prevent a Dead Car Battery! DIY Guide - Page 2 - Mercedes-Benz Forum

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post #11 of 16 (permalink) Old 09-29-2007, 03:54 PM
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The TSB says venting acid not just hydrogen gas.

Originally Posted by gregs210 View Post
ALL lead-acid batteries generate hydrogen gas vapor during normal operation. Aside from being corrosive, this gas is also flammable.
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post #12 of 16 (permalink) Old 09-29-2007, 10:55 PM
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If I knew that I will be leaving the car outside for 4/5 months not used, I'd just disconnect the battery for the whole time.
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post #13 of 16 (permalink) Old 09-30-2007, 08:50 AM
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I used a similar solar panel on my seldom used Suburban but it didn't work. I never found out what the problem was. After changing to a new battery, never needed that panel again. The car would start even after 2-3 weeks.
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post #14 of 16 (permalink) Old 09-30-2007, 09:10 AM
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Originally Posted by cerritos View Post
If I knew that I will be leaving the car outside for 4/5 months not used, I'd just disconnect the battery for the whole time.
I don't think that's a good least from what I've read.
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post #15 of 16 (permalink) Old 09-30-2007, 10:24 PM
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Originally Posted by mlfun View Post
The TSB says venting acid not just hydrogen gas.
Ummm...yeah, but the battery generates heat, so the gas is warm. When it cools, acid condenses from it. Same thing as boiling water on the stove, the steam is a gas but as it cools, it turns to water droplets on the underside of the range hood. Hence, if you don't vent the vapor (hydrogen gas) to the outside of the car, it condenses inside the compartment as acid.

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Last edited by Check Codes; 09-30-2007 at 10:28 PM.
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post #16 of 16 (permalink) Old 10-01-2007, 12:46 PM Thread Starter
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Originally Posted by asianml View Post
I don't think that's a good least from what I've read.
Agreed. The whole purpose of my preparations before I left, wash/wax, Sta-Bil,
Oil Change, Fill the Gas Tank, Car Cover, Overpressurize Tires, Solar Battery Charger was when I returned 5 months later; my Car would be in good condition and start.
I have been reading horror stories on the Forum about when the Battery dies how it started a cascade of problems.

No doubt MB's are "energy hogs".
Everything worked out smoothly.

Of course this can work for your Motorcycle, RV, Boat, Aeroplane etc.
Not just the Charger Unit but also the preparation beforehand.

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