Just to piggy back on the power bank. I believe Bangkok airports is one of the rare airport (or maybe China, I can’t remember now that China borders are practically cut off from the rest of the world) that have a strict regulation on power bank as a carry on. I have been through on a number of airport security and the security handling agents do not really bother on power banks that are hand carried. However in Bangkok through my limited experience the security handling agents would inspect them to ensure that they are not over 32,000mAh. So do ensure that the battery specification are labeled or risk getting them confiscated.