A prototype of a MacBook charger

Seen on eBay, a prototype USB-C MacBook charger.

It’s a 29W model, designed for the first MacBook. Due to its age, it only supports two voltages: the standard 5V and Apple’s specific 14.5V. According to the seller, it only offers 5V, but the 14.5V is non-standard, so testers might not necessarily detect it.