MARINCO Replacement Battery 2500 mAh

Hello
On April 30th, I ordered a charging battery for a MARINCO solar aerator. Order number 3915953, Item number 24261.
After replacing the previous battery during the installation of the MARINCO aerator in 2022, I installed and operated the aerator in May without difficulty, connecting and disconnecting it every hour or so. In June, I had to travel to France for a week from June 16th to 21st and left the aerator in the "on" position, as I regularly did, aided by mild and sunny weather which should have recharged the aerator daily. Upon my return, to my surprise, the aerator no longer worked and the indicator light no longer illuminated, as if it hadn't recharged. Upon disassembling the battery again, I realized that it There was no mention of the manufacturing date and therefore of the first recharge. I am ready to send you the battery so that you can make a diagnosis and possibly replace it.