"Your AirPods can get up to 5 hours of listening time or 2 hours of talk time on a single charge" Source:

This means you can go for a nice long jog or exercise without bringing your charging case with you. Just take these neck strap Earbuds holders Watch band attachment with you to provide extra protection against dropping or losing of your AirPods earbuds. 

Flexible, comfortable AirPods Ear buds neck strap for jogging and exercise.

• Perfect fit for your Airpods Pro perfectly
• 10 colors available: White, Red, Black, Blue, Navy Blue, Camo Green, Mint Green, Gray, Pink, and Yellow 
• Precisely designed to fit the Apple AirPods buds perfectly
• Made of sweat resistance silicone
• Light-weight and strong; Engineered with long lasting protection.