Keep Your Phone Battery Charged | Consumer Reports

Phone cases promise to double battery life. Consumer Reports tests them, as well as a portable battery pack, a solar-powered charger and a crank charger.

[venom]

Just a little FYI, Groupon has the case one for the iPhone for $35 right now. 

[graydawg]

It would have been nice to have links to the products

[NSXLA]

Or on samsung phones you can just carry a spare internal battery WITHOUT adding a bulky case!

[thRiflesOCI]

I love to see campers cranking power to there phone :DDD

[RealtimeReviews]

Battery technology has really not come far in years!

[bmwmsport]

My iPhone's battery is starting to show its age after 1 year of use. I'm just gonna take the screen off and replace the battery. A normal charge will be enough to last me a day as long as it keeps its original battery life.

Not a fan of those battery pack cases. 

[frodo]

I used Android base Samsung Galaxy S4 and can never complete a day without  recharging!   I tried a Windows 8.1 base Nokia phone and after a complete day without recharging, I still have 45% batter left. 
From all previous phones I used, Android base are not well optimized now that ive tried Windows 8.1 OS phones. I noticed that its better optimized OS.  which in turn results in requiring less energy to function thus 3x more batter life compared to any of my Android phones from my past experience.

[juantubero]

What is the hype about people desiring THIN phones....if they are going to add a thick case and now they have a THICK phone for

[undertakerundefeated]

That battery charger for samsung is a copy of sony batteries of 5000 Lol