iKross White 2 USB Port Compact External Portable Rechargeable Emergency Backup Battery Charger (5000mAh) - Includes USB Charging Cable + Interchangable Charging Tips + 1 Year Warranty - for HTC MyTouch 3G Slide, Evo 3D 4G, Droid Incredible 1 2, HD2, Droid Eris, Hero, Inspire 4G. Desire S 4G, Thunderbolt, Merge, Arrive, Trohpy, HD7 S, Aria, MyTouch 4G, myTouch 3G Cell Phone Review

Average Reviews:

(More customer reviews)Works great for my EVO, and Nook.
I had troubles at first (My Evo showed it was charging but then would run out of power and die). But I realized through trial and error that you have to turn the battery on first (ie the blue light are lit up), otherwise its not really charging, even if it looks like it is.

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