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Solved: Not charging battery Backups pro 1500 - Communities
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My battery not charge, sometime I can hear a clack sound when check the battery trying to charge and turn off, APC back up Pro 1500 : r/APC
Solved: Back-UPS Pro 550 not charging battery when powered on - Communities
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Amazon.com: APC UPS Battery Replacement, APCRBC110, for APC UPS Models BE550G, BE550MC, BN600MC and select others : Electronics
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SOLVED: UPS left alone, unable to power up even with new battery - UPS - iFixit
