A:Answer Hi Carol. Thank you for your interest in the V8 Absolute. You do not need to wait for it to have a full charge to use it. However, without a full charge, you do not get the full battery life for each use. MAX mode is great for heavier debris. With the clear canister, you will be able to see that you are getting enough suction as you will see the debris within the canister, ensuring you that it is picking up.
Best Wishes,
Krystal
Dyson Customer Service