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Battery Hissing??


Tpoppa

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...so I was installing a new battery on the GF's Nighthawk 2fity.

I added the electrolyte, charged it, and let is sit per the instructions. I attached the positive terminal, and as I ws 'trying' to attach the negative terminal the battery started hissing and getting hot. I disconnected it and let it sit for 5 minutes. I tried again with the same result. WTF? Did I get a bad battery?

I never even had the ignition turned on.

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Two things:

1. hook up the negative first then the possitive

2. are you sure you are connecting to the right terminals? If the fuses are blown on the bike you put it in backwards. At least you hope the fuse blew if you installed it backwards.:eek:

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I know it sounds like an obvious question or thing to try, but, check the battery with a meter

and make sure that the polarity is actually correct. I've seen a battery charged BACKWARDS

so that the polarity actually read the opposite of what was marked!

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Negative is the first to be removed and the last to be connected.

Really??? And all these years I've done it backwards.:o I always figured it was best to have it grounded before going to the live circuit? Live and learn. :) See what happens when a scientist trys to play mechanic! :lol:

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It's because the positive side is the one that wants to throw sparks.

Also, if you disconnect the positive side first,

a short circuit might be made to the chassis, which is still hooked up.

Disconnecting the ground first prevents that.

A hissing battery is venting gases. Either through the vent, or through a crack.

(hydrogen gases, no sparks or flames around that please)

I don't know why. A battery can hiss for a lot of reasons.

It should probably not hiss. Certainly not with the engine not running.

Check battery voltage for 13.8v to 14.5v

Charge it or have a load test done if in doubt.

edit: checking the polarity. It would not have charged up backwards when adding the acid.

But check and make sure that the new battery is the same as the old one.

I mean are the positive and negative terminals on the correct sides.

I've been given batteries that look the same, but the terminals are reversed.

Edited by ReconRat
moar
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