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[Howard]

Doesn't the hydrogen just float away ( being lighter than air )

I never connect to the vehicle , always to the negative terminal

 

[Dieselman]

BTB500 is right, you should connect remotely to clear any hydrogen bubble surrounding the battery.

A friend had about 8 large batteries blow up on his boat when a lead came loose and caused a spark..made a mess.

 

[MBManInKen]

Doesn't the hydrogen just float away ( being lighter than air )

I never connect to the vehicle , always to the negative terminal

In a closed environment like the boot, there is always the risk of hydrogen bubbles around a weak battery and as the hydrogen is leaking from the battery, you don't want to rely on it having been wafted away .

BTB500 is right

I'm not sure Bill would appreciate being mistaken for a foreigner in West London .

A friend had about 8 large batteries blow up on his boat when a lead came loose and caused a spark..made a mess.

Did he get away unscathed? If so, he was a very lucky man, that acid can cause real havoc .