ReVolt could be a greener alternative to powering gear that typically runs on batteries | MusicTech
X-Tra launches a new battery on Kickstarter. Has 70% more capacity than regular Sony battery, has USB-C, charge indicator - sonyalpharumors
The 'X-Tra' camera battery Kickstarter campaign appears to have been a scam: Digital Photography Review
Kickstarter: This Revolutionary Camera Battery will Lighten Your Bag and Change the Way You Shoot | Canon Rumors - Your best source for Canon rumors, leaks and gossip
The 'X-Tra' camera battery Kickstarter campaign appears to have been a scam: Digital Photography Review