Review on Long-Lasting EBL 9V Lithium Rechargeable Batteries With USB 5400MWh Capacity (Pack Of 2) by Alonzo Wilkins

I was hopeful that I could use these batteries to extend the time between battery replacement for my First-Alert smoke/carbo monoxide alarms. I had good experience with EBL before and it was a brand that I trust. My first set of batteries lasted only barely 2 months before my smoke alarms started beeping. I now learned that these are not good for First Alert smoke/carbon monoxide alarms. Unfortunately, my first set of 4 was ordered two months ago and I could not return them any more.[7/2/2022 Update] EBL reached out to me and offered full refund on my two purchases. While this set of batteries did not work with my First Alert smoke detectors, I am confident in using other EBL battery products. I applaud their dedicated customer service and raised my review from 2 stars to 4 stars.