Quote:
Originally Posted by jakeru
Don't know who told you this old wive's tale? (And you are aware that AGM batteries have lead-acid chemistry?)
Even if it's only for an exceptional circumstance, (e.g., battery or charging system malfunction), having a vent sure seems like a good idea to me when the battery is located in an area without plenty of natural ventilation, (and where sulphuric acid vapor-induced corrosion would be so damaging and expensive to repair) like is the case on our cars...
Nice find! That looks just like what I've got on my AGM battery...
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Crazy. I buy two AGM's each year for our waverunners...never have vent ports.