Enginer PHEV Prius battery warmer

[GeneralAnarchy]

I used aluminum strips as clips to hold the 60W battery heater at the right height against the Enginer box. The 60W heater is mounted just below the center hinge, between the OEM battery and the Enginer system, so both should get some heat.

I am using this heating pad:
Amazon.com: Kat's 22400 60 Watt 5.5"x 8.5" Battery Pad Heater: Automotive

This thing gets pretty hot to the touch, so I also put an aluminum piece right in the center to make sure contact with metal is maximized.