APC Back-Ups Pro 1000 Battery Replacement - BR1000G/BR1500G

My APC Back-Ups Pro 1000 started beeping and the battery light started blinking. So, lets replace out the rechargeable battery.
APC RBC123 (7Ah) - amzn.to/3JM4wOZ
APC RBC124 (9Ah) - amzn.to/4b2mYPq
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[@pepeshopping]

Paid double just for the convenience of the connector and cables connecting the 2 batteries in series.
Old ones can be reused.