"Despite the cost, we purchased the above for the Christmas Train. The products worked great, right out of the box, and my grandchildren were thrilled with it. However, absolutely no instructions were provided with either one. When recharging the battery pack, the red light blinks continuously. How do I know when the pack has reached full charge? There is nothing to tell me how long to expect a charge to take. With only a limited time warranty on these expensive items, I hesitate to pack it away until next Christmas. Is this the normal recharging method? Or is something wrong with the charger / battery pack? Why are there no instructions on something that cost nearly $80.00, and has a FUNCTION ?"