Looking for an APC RBC133 battery? Then you've come to the right place. We have been selling batteries for APC RBC133 UPSs online since 2003 and will have the correct battery for your UPS in stock, available for next day delivery. Use our APC RBC133 battery guide below to find a suggested battery for your UPS and compare it to the battery fitted to your RBC133. Need help? Simply contact us.