usdt transfer energy
https://ace-wiki.win/index.php/USDT_Transfer_Energy_Management_Gains_Attention_on_TRON_Network
Sending USDT on TRON needs a bit of energy to cover network fees, which is basically the computational power for processing your transaction. Without enough energy, you'll pay extra TRX as a fee, so staking TRX for energy can make transfers smoother and cheaper.