I've done a decent amount of traveling - honestly the most important thing has always just been to have stuff that works. Charging things has rarely been an issue. A few extra cables in the luggage is not a big deal.

Terrence's issue here is that he is over complicating things:

- Toothbrush - Just take a non-battery toothbrush, it's perfectly fine and will not break down or need charging.

- Tracker - I'm doubtful you will get it back in most countries. Always keep the essentials such as phone, wallet and passport on your physical person where possible.

- Bug Bite Zapper - Do as the locals do, they too don't want to be swamped with insects.