Watching Sealed Lead Acid Batteries Fail Through Time Series Temperature Data

First temperature spike occurred on 8-21.
Temperature fluctuations prior to this were ambient room temperature related.
After 8-24 a new temperature floor of 96F was established.
Second major increase occurred 9-9 - 9-10.
Third major increase and peak was on 9-15 at 14:00.
Peak temperature was 129F.
Batteries were replaced on 10-5.