Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: don't waste your money

Purchased two of these batteries just before Christmas to replace 4 year old factory batteries for my Canon digital Rebel SLR. The first one held a charge great for about a month, held a second charge for about a week, then died entirely. Just remembered I had a second one, unopened, and put a charge to that one, which lasted about 15 minutes, or 30 pictures. Missed a few great moments with my 1-year old. Warranty is 30 days, so they could not be returned. Absolutely rubbish, don't waste your money. Spend the extra and stick with Cannon batteries.