Instruct: Classify a review into positive or negative sentiment.
Query: TWO Dyson DC 16 Batteries won't recharge after only 10 days.

I purchased TWO Dyson DC 16 vacuums 10 days ago. BOTH of them have a faulty battery. Neither battery will recharge. The green charging light comes on for about 5 seconds then turns off leaving a dead battery. It's shocking that thess vacuums are still for sale as its obvious there is a huge problem with the batteries.