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Old 11-16-2008
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Idiens Idiens is offline
Larus Marinus
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It should not hurt the charger to be plugged in but not connected. Just don't let the outlet leads touch! (Even then, it should be fused).

I don't know the charger, but I am never surprised to see a spark when connecting a battery.

I would however normally connect the battery prior to plugging in the charger.

P.S. What does the charger's handbook say.
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