Get out a calculator to see if it's worth the risk.
A 2010 Camry gets 26 mpg combined, 15,000 miles per year at $2.50 a gallon is $1,442 per year in gas.
A 2010 Hybrid Camry gets 34 mpg combined, 15,000 miles per year at $2.50 a gallon is $1,102 per year in gas.
Is saving $28 a month in gas worth it for the added risk of replacing the battery pack?