This is a video of how I reconditioned a hybrid battery in a second generation 2004 - 2009 Toyota Prius. This can be done on any of the hybrid traction batteries. This was a learning experience but hopefully it will help anyone that is in the rebuilding or reconditioning process. 220 volt DC battery. Caution do not try this at home of if you are inexperienced. High Voltage can cause serious injury or even death.