Recurring heat requires attention
Some warmth may occur in normal operation, but a battery that is much hotter than surrounding units, swollen or accompanied by odor or noise should be treated as abnormal.
Check the surrounding environment
From a safe position, note room temperature, ventilation, nearby heat sources, charger alarms and whether one unit or the entire bank is affected.
Quick checklist
1Avoid direct contact
2Check for swelling or odor
3Review charger alarms
4Request qualified inspection