Tim: >> How many let you hot swap a battery? Surely that's a requirement, to >> be able to change an aging component, without having to power down >> the computer that it's supply. It is supposed to be an >> *uninterrupted* power supply. Bruno Wolff III: > That is not its purpose. It is to provide you with time to cleanly > shut down the system to avoid damage. If you want constant uptime you > need a backup power source as well. At that point you are probably > going to be buying something other than a consumer UPS which could > potentially have a way to swap batteries under load. Hmm, perhaps cheapy consumer UPSs... But if I was getting a UPS, I'd want one that I could change the battery without having to shut down the computer (how it gets power in the meantime is another matter). UPS means uninterrupted, or uninterruptable, power supply. It ain't one if it can't do that... ;-) -- (This computer runs FC7, my others run FC4, FC5 & FC6, in case that's important to the thread.) Don't send private replies to my address, the mailbox is ignored. I read messages from the public lists.