My oldest batteries will be 8 years old this year, as they enter their 9th summer. THey're are in Dolphin cases, and were built per the standards of that time, with cells glued together with hot glue, shrink wrapped, and stuffed into the case with foam inserts. The foam has shrunk a bit and the cells are sliding about in their shrink wrap. .
Continued jostling could cause any thing to happen inside the wrap. The glue could loosen, wires could fray, and cells in contact with each other with only the PVC wrap as an insulator could wear thru the wrap.
Top is a 2015 Dolphin. Bottom is a 2019 model that uses cell holders.
Continued jostling could cause any thing to happen inside the wrap. The glue could loosen, wires could fray, and cells in contact with each other with only the PVC wrap as an insulator could wear thru the wrap.
Top is a 2015 Dolphin. Bottom is a 2019 model that uses cell holders.