This is common when one or more cells have shorted out inside the hybrid battery pack. here is a guide that shows whats inside and instructions on how to replace the the battery in the diagrams with the exploded view as well so you can see how it works:
Make sure you wear insulated gloves when working with the hybrid battery. The Hybrid battery is heavy and you might need a hoist to lift it out. Also this is a high voltage system and you must follow the directions or personal injury can occur.
Check out the diagrams (below). Please let us know what happens.
Images (Click to enlarge)
Monday, August 5th, 2019 AT 1:08 PM