Please note that your RoboVac's runtime depends on its current suction mode and the types of flooring it cleans.

On hard floors:  

For Bounce series, RoboVac's runtime is approximately 100 min when its suction mode is set to Standard mode.; 

For G30 series and G32 Pro, Standard suction lasts approximately 100 min, Max suction lasts approximately 70 min; 

For G20 series, Standard suction lasts approximately 75 min, Max suction lasts approximately 40 min.

For G10 Hybrid, Standard suction lasts approximately 80 min, Max suction lasts approximately 40 min.

For G40 series and G+ series, Standard suction lasts approximately 100 min, Max suction lasts approximately 60 min;
For G50 series,  Standard suction lasts approximately 100 min, Max suction lasts approximately 60 min;

If you are using the Max or BoostIQ suction mode or running the RoboVac on carpets(G10 Hybrid works for hard floors only), the runtime will be shorter.

Please charge the vacuum for 6+ hours to ensure it's fully charged. A solid blue light shows that it is fully charged. If the runtime is way shorter than expected in the related mode after the RoboVac is fully charged, the issue could be due to the battery. Replacing the battery would most likely fix the issue. 

You can refer to the video here to learn How to Replace RoboVac's Battery (for Bounce series and G series). (not for RoboVac 11+, 11C Pet edition, L70 Hybrid, X8 series)

You can order a new battery on eufy official website or on Amazon.