Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Does not charge my iPAQ 3835 off a powered USB port

I read the reviews prior to purchasing this device. Some commented the product performed as advertised. Others had trouble getting the device to charge thier iPAQ. I happen to have another USB sync/charger cable manufactured by Belkin, handy. I plugged the Belkin model into a powered USB port and it performed very well. It came with a switch which allowed one to hook up and just charge or hook up and sync. When I tried the iConcepts cable, it failed to charge my iPAQ although it did sync. I called the folks at Sakar International who produce the iConcepts' products and they admitted that my device was probably defective. They offered a replacement, but I elected to return the cord to Amazon for full reimbursement. Course, Amazon was great and even paid for the shipping, as the customer service at Amazon is always excellent. I caution folks to reconsider purchasing this product since it appears many have received defective cables.