Wireless charging compatible like Apple MagSafe charger Touch operation fully Improvements (compared to 3D printed version): Full cast tamper Injection molding system to ensure no appearance defects Made from double-sided printed circuit board, the optimal design Firmware power management for longer duration OLED screen Buttons now operate by sensing Power button on the top side for more comfort Easier to replace the battery yourself (small USB type 9V) New features: Power management with automatic shutdown (for longer usage) Automatic wireless charging stop when the battery is full (for longer battery life) Weight: Product: 315 grams Shipping: 480 grams Dimensions: Product: 92 mm × 92 mm × 72 mm Shipping: 115 mm × 115 mm × 100 mm Power: 9V battery Rechargeable via standard Qi wireless charging Full charge time: 1 - 2 hours Standby time: about 24 hours (needs recharging afterward) Power: 25-30 pounds