All EB Design vaporizers that are rechargeable come with a USB-C port, but you'll need to buy the USB cable separately. Some of the rechargeable models include the BC5000, Lost Mary OS5000, Lost Mary MO5000 and Funky Republic Ti7000. The Elf Bar BC5000 comes with a USB charging cable, which can be used to charge the device using any USB port. However, it's important to note that using a different charger than the one provided by the manufacturer can be dangerous and damage the device or battery.
The BC3500 comes pre-filled with 10.5 ml of ejuice and will last 3500 inhalations, while the BC5000 comes pre-filled with 13 ml of ejuice and will last 5000 inhalations. It's more ejuice than any other disposable product I've heard of.
An Elf Bar BC5000, advertised with 5000 inhalations, will last up to a week for heavy vapers and an occasional vaper up to two weeks, maybe longer. Elf Bar vaporizers come in several sizes and have 27 different model types (and counting).
Elf Bar Bc5000 changed the name. Elf Bar and EB Design are the same, but EB Design is due to the rebranding efforts necessary to avoid further legal problems.