Have a APC Back-Uninterrupted Power Supply ES 500 needs a new battery just no longer needed so haven't replaced it information below for sale for $15.
Spec
Output Power Capacity 300 Watts / 500 VA
Max Configurable Power 300 Watts / 500 VA
Nominal Output Voltage 120V
Topology Standby
Output Connections
(3) NEMA 5-15R (Battery Backup) NEMA 5-15R
(3) NEMA 5-15R (Surge Protection) NEMA 5-15R
Input
Nominal Input Voltage 120V
Input Frequency 60 Hz +/- 3 Hz
Input Connections
NEMA 5-15P NEMA 5-15P
Cord Length 6 feet (1.83 meters)
Input voltage range for main operations 88 - 139V
Batteries & Runtime
Battery Type Maintenance-free sealed Lead-Acid battery with suspended electrolyte : leakproof
Typical recharge time 24 hour(s)
Replacement Battery RBC2
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