I have two APC UPSs.  One uses a 12V 9.0AH battery which I just replaced with a new one.  I also have another, older APC UPS sitting around, I noticed it is using a 12V 7.0AH battery.  Both batteries are the same physical size and the terminals are the same width.

Question is, can I get a new 12V 9.0AH battery and put it in my old UPS which uses 12V 7.0AH?

Thanks!