"$90 for a battery pack is steep--especially when they provide you with no way to charge it. There is no way to recharge the pack without making a separate purchase for the power cord. Although they mention this in the product page (when you choose to read all the details), it just comes across as a hidden expense for an already steeply overpriced item. Why not bundle them together? Certainly Lego can get these at a cheaper price in bulk than the consumer."