is it fine to leave steam deck in sleep mode instead of turning it off?

So for some time now i have been taking steam deck with me for my travels but i have always turned it off instead of putting it to sleep so battery wouldnt drop too quickly but i never checked if it would actually drop too quickly when i put it to sleep... Soo what now? Should i still power it down or would it be fine if i put it to sleep? Also forgot to add, battery precentage matters to me since i dont have always access to charger