There's an offer to upgrade energy from 110 to 150 to be purchased with 799 diamonds. Is this upgrade..

The extended energy bar costs 799 diamonds and can be found by tapping the plus sign next to your energy count. You get 450 energy to start, energy that refills to 150 in 5 hours (instead of capping at 110 in 3hr 20 min), and 150 energy (instead of 110) for every character puzzle you complete and every star booster you activate. It will remain a permanent feature of your game. Highly recommended for those who want to play more or need more plays during Detectives Needed Key Challenges or Team Competitions.