Are there any good ways to get the swelled down on a UPS battery? The unit said the battery is bad and a new one was ordered. Tried to pull out the old one using 2 people and we couldn't get it out at all. It looks like it is buldged a bit in the middle to where we can't get it out. Plugged up the new battery to the side of it and it seems to work ok, just can't place the new battery inside.