Battery Making A Funny Noise

[Pernig]

There's a 60 Ah battery which my Dad has left on charge downstairs. It's started making funny noises like there's some fluid evaporating from it. Should I turn it off or will it be safe to leave it?
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H100 Breaking for spares

[Dilusi]

Its normal, dont' worry about it.

[cyberglass]

Probably just the bubbles that recharging generates

Just keep an eye on it if it starts to balloon up your in trouble get it disconnected and dont knock it in case it bursts
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DL650 Vstrom 2004
DRZ400S 2003
Yamaha R1 2005

[Noxious89123]

Sealed battery, or the type that you have to keep topped up with distilled water?

If it's the sort where you have to check the electrolyte level, it might be a good idea to make sure it doesn't boil itself dry.
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'06 Honda CBR125RW-6 ~ '00 Honda CBR600F-Y ~ '07 Honda CBR600RR-7 ~ Bikeless
'53 Ford Ka 1.3 ~ '03 Vauxhall Astra SRi 1.8 ~ '52 Vauxhall Astra SRi 2.2 ~ '53 Vauxhall Astra GSi

[Pernig]

It's a regular battery rather than a sealed one, it was just unusually loud. Turns out my old man had left it on a very long time (his car has a broken alternator that he can't be arsed to get fixed). Thanks for your help, guys.
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H100 Breaking for spares