Replaced battery. Now 4 beeps & green led cycles

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Replaced w/non APC battery in this ES 500 and let charge. Now with no load, when I press the button the green led comes on and I hear a slight buzzing sound. Then a click and the led goes off and 4 beeps. Then green led comes on again and quiet for ~30 sec. Repeats. The replace battery led never lights and the circuit breaker button has no effect.

I plan to install and check PowerChute software after borrowing the cable from work on Monday. Any insight would be appreciated.

Thanks,

Mac

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