Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great Batteries, Excellent Delivery

What a surprise! Both batteries are working great. These replacement batteries hold their charge longer than the factory replacements I have used costing twice the price. Snail mail delivery was right on time (less than a week) and the notifications of reciept of payment and shipping kept me constantely informed about the order. I had some doubts in the beginning but am greatly satisfied with the entire tranaction.