Longevity
I purchased 4 of these batteries and 2 of them are beeping every 2 seconds. if I turn on the inverter, it just beeps. I have attempted to reach out to Mighty Max and have not received a response.<br /><br />Update - I  took all 4 batteries to be tested and the result is all 4 are bad. Mind you, I purchased them to be used during hurricane season and have not used them, yet they are all determined to be bad, 2 of them are under warranty and are 10  months old. DO NOT  buy these batteries,
Rating: 1 stars