The battery life isn't as long as I'd like, but the battery pack is slim and sleek, which is good for mobile gaming and finding those outlets on the road.

CNN: Review: Razer Blade gaming laptop sleek, powerful, pricey

The juice pack virtually doubles the battery life of the iPhone and its soft touch hardware also provides protection from device bumps, bangs and drops.

ENGADGET: Mophie's $80 Juice Pack Air ships to power-hungry iPhone 4 owners

The battery pack provides up to 16 hours of life on a single charge and will re-charge itself within the unit when external power is detected.

ENGADGET: Four new Oregon touchscreen GPS devices pop up on Garmin's website (updated)

Its two selling points are an extended battery range of 120 miles rather than 100, and onboard battery heating and cooling, which should extend the life of the pack.

FORBES: Electric Car Rentals Start Next Week

It uses NFC-equipped tags that pop into the end of each club and a hip-mounted "GYG" device to collect the data with a battery life of two rounds (about 8 hours) -- and no need to pack a smartphone or tablet onto the course.

ENGADGET