RE: Thanks, Horizon
If I had the experience Shaggy did, I "think" I would have told the LHS owner and son that they were permanently losing a customer by refusing to handle a simple exchange transaction. If I read post #10 correctly, the battery pack never left the store so there should be no question of whether it could be returned to Horizon by the LHS. I'm pretty sure all of the shops in my area would have been very embarrased about ordering the wrong item. I don't think they would "give" me anything for the inconvenience of making multiple trips but they would either give a refund or handle the exchange.
Back on topic...
I don't own very much "Horizon" stuff and I've never had to use their customer service dept. It is good to hear that they still care about customers.