When I received the pump I had to replace the battery which was no big deal. But then I saw why it was needing replaced, after using it wouldn't auto turn off. It stayed on for a couple of days. I used it again and then it decided to start working properly. So I kept turning it on and it would turn off after one minute as programmed to do. I was going to return it but so far it seems to be working for now. I sure the issue will return and if so I will purchase a manual pump instead and toss this one.