Amazon.com: APC Back-UPS ES 500VA UPS Series Replacement Battery for Model BE500C : Electronics
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APWBK650EI - APC Back-UPS CS 650VA 230V For International Use - 650VA/400W - 11.4 Minute Full Load - 3 x IEC 320-C13 - Battery/Surge-protected, 2 x - Battery/Surge-protected, 1 x IEC 320-C13 -
APC Back-UPS ES 500VA 300W 120V 6-Outlet UPS - NO BATTERY | eBay
APC Smart-UPS Li-Ion, Short Depth 500VA, 120V with Network Management Card | APCGuard.com