I've got a 3 year old dc30. Few month ago my battery died, so I bought a new one from dyson Australia website. I received it today by mail. I connected it to my dc30 and pressed the button to see if it runs. It worked. But when I put it on charge the green charger light was staying on only for 20 minutes. Usually full charge takes about 2-3 hours. Please advise on where the issue might come from. I'm really confused.

Vacuums