Have you purchased a roomba vacuum only to find out that the battery could do with a bit more juice. Well don’t threat this is the only accessory you and your roomba will ever need, the irobot 4905 battery has 50% greater life usage than the original roomba batteries. That means you will be able to get more cleaning done on a single charge. The APS battery is also compatible with most roomba models so there is no need to worry about getting the wrong battery. It is the perfect accessory for you especially if your roomba isn’t working to it’s full potential you just need a new battery and the whole device will be as good as new. Even if you don’t need a new battery I would take a serious look at this battery just as a spare. Especially at the moment because if you go to this website there is over 50% off. Check out the irobot 4905 battery before the price goes back up.