Been on the look out for this Satechi USB-C Power Meter Tester which basically provide info on the power current going from your power source to your MacBook. Pretty good for nerds who wants to know inside out of your devices. Currently selling for USD29.99+$5.18 shipping from Amazon US and cheapest I can find on eBay is AUD43+.
Only less than 6mins left at the time of posting as its lightning deals!
8 mins till sold out. Would have bought one.