Notice! This is NOT a direct replacement!
This battery is NOT a direct replacement for an APC RBC4! The APC battery is 3.698" high, this battery is 3.759" high and WILL NOT fit into the APC UPS battery compartment! Buy it at your own risk, you have been warned! I, rather than go through the hassle of hauling this battery 10 miles to the UPS Store, took my Dremmel tool and modified the battery compartment to accomodate this battery. It was a mess, but less hassle than taking it to UPS for return. I am very, very sorry I didn't spring for an ORIGINAL APC battery. Do yourself a favor, pay the little extra and get a Genuine APC battery!
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