I LOVE this thing! After doing a trial run at their house, I brought it home to charge it and ordered one for myself. It will be perfect for washing pups. It is charged via USB which I think is very strange and completely out of the wheelhouse for the elderly. The good news, the charge should last for an hour of use. I need to buy them a wall charger but right now, I'm keeping the charging cord and will recharge as needed. Fabulous gadget!