Handbook just says to connect the battery leads, ground lug, and then plug into AC.
If a spark is common, it woudl be nice for them to mention it in the manual!!
I am not talking a huge spark, like what you get if you short out jumper cables, when boosting a car. However, it is definitley a noticible spark, and I don't want to do permanent damage to the battery, or charger, if I can help it.
If anyone else has noticed something similar, it would be nice to get additional confirmation!
Thankd agin for your input Idiens!!