Both units have the same design and components, as shown on our web page.
The differences are:

The V2 is powered by two AA batteries (not included) and has a top speed of about 3,000 RPM
The Lithium is rechargeable via USB-C, powered by a 3.7V built-in Lithium-Ion battery, and has a two-speed option: 4,000 RPM and 3,000 RPM when fully charged.
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