One problem related to battery has been reported for the 2008 Toyota Highlander Hybrid. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Toyota Highlander Hybrid based on all problems reported for the 2008 Highlander Hybrid.
Toyota Highlander Hybrid 2008 requires frequent jumping due to dead battery, this has been since I bought it, but more recently I have had to jump the car once a week.