 As a consequence, the company started a program to examine and upgrade each of the PHEV conversions it had manufactured.After this, only one more Prius PHEV conversion was completed and then that product line was discontinued.Towards the end of its existence, it converted Ford Escape HEVs to PHEVs by replacing the stock battery with a PHEV battery in the original location (as opposed to augmenting the stock battery with an additional battery, as normally done by other PHEV conversions), and adding a charger and a plug.