| Feature | 2012 VMR Original | 2021 VMR Heritage Edition | |--------|------------------|----------------------------| | Cell type | Unprotected 18650 (2x) | Protected/Unprotected 18650/21700 (2x) | | Output voltage | 3.3V – 6.0V (0.1V steps) | 1.0V – 12.0V (0.01V steps) | | Max current | 15A continuous | 40A continuous | | Charging port | Micro-USB 1A | USB-C PD 3.0 (30W in/out) | | Display | Single RGB LED | 1.3" e-paper (ultra-low power) | | Firmware update | None | Over-the-air via Bluetooth | | Weight (no cells) | 185g | 210g (due to stronger magnets and e-paper) |