When you have a cordless vacuum I think 2 batteries are very useful.
I love my Utenic U20 vac.It picks up dirt so well is quiet and well made. And bends in the middle to get under furniture. Previously I have had 2 Shark vacs(one after the other of course, I bought a second battery for each of them too.)
They really are expensive and only do what my Utenic does for one third the price.
This really is about how good my second battery is but I couldn't help mentioning how good the new Utenic vac is too. My second battery charges quickly about 2 hours retains it's charge. For peace of mind I always have a fully charged battery ready to take over when the first needs charging. So I don't have to wait 2 hours before I finish vacuuming.
