LCD and Viewfinder
Panasonic G1 has a Fully Articulated 3" LCD screen with a resolution of 460k dots. Both the screen size and the screen resolution is up to the standards of this class.
For those of you who loves shooting self portraits or group photos, Panasonic G1 will make your life easier with its Selfie friendly
G1 has a built-in Electronic viewfinder. The viewfinder has a coverage of 100%. 100% coverage ensures that what you see in the viewfinder while shooting matches exactly what you will get later in your image, helping accurate framing your shots and minimizes the need for cropping images later.
Max Shutter speed
Panasonic G1 can shoot continuously at max speed of 3 fps
and has max shutter speed of 1/4000 sec
G1 has a built-in flash, and it also has a flash shoe to mount your external flashes too.
Panasonic G1 features a Contrast Detection autofocusing system.
Unfortunately Panasonic G1 doesn't have Video recording ability.
Connectivity and Storage
You can connect G1 to compatible devices via its HDMI port or USB 2.0 (480 Mbit/sec) port.
Panasonic G1 is powered by a proprietary battery which provides a shooting life of 330 according to CIPA standards.
Considering that the average battery life of Mirrorless type cameras is 364 shots, its battery life is about average in its class but it would still be wise to invest in some spare batteries for long photo trips.
Battery Life Comparison in Entry-Level Mirrorless Cameras
Samsung NX mini with its 650shots is the model with longest battery life among Entry-Level Mirrorless cameras. Check the comparison of Panasonic G1 vs Samsung NX mini or take a look at Longest Battery Life Mirrorless cameras list.
Panasonic G1 Features Compared to Main Competitors