3-Port High-Capacity Portable External Rechargable Backup Battery Pack -10000mAh (2A/2A) for iPhone iPod iPad, MP3 Players, Tablet, GPS, DV Recorders, Phone, Sony PSP, Nintendo and More

Size and weight exactly like a portable usb harddisk (which is exactly what I am looking for). It is able to quick charge all sorts of devices I can think of, due to built-in "samsung port", which make all usb devices (not just samsung's) think they are connected to a wall charger.Passthrough Mode: Able to charge usb devices while the battery pack itself is being charged. Nice!The auto power cutoff works as claimed, but the device being charged must be off, so that full-charge can be detected, (or else the battery pack will continue to supply power, which is correct behaviour).Every socket tip you would ever need is included from mini or micro usb to weirder types for photo frames or radios. Surprisingly, all accompanying cables are solidly built, including the very useful flexible springy cable. Included international AC wall charger and car charger are compact and light to be portable. The pack's size was more manageable than I had initially thought, as its shape means smartphones can be held/gripped comfortably together while charging on the go.Generally satisfied. I calculated the capacity-to-weight ratio, and compared with other offerings, and found that it excels.Update: However, it might have capacity issues. I really wonder whether it does really hold 10000mah, or much less. I think their voltage convertor (from 3.7V LiPo to 5V USB) is inefficient and a lot energy could be loss as heat. This explains why it can charge my 1300mAh smartphone 5 times, my mobile 3G hotspot/mifi 3 times, but can only charge my 4400mah Kindle Fire only once, before running out of juice.Update 2: Efficiency across all battery packs is 70%. 30% is loss as heat during charging process.

.-----2 May 2012Two months later, I still recommend this battery. No problems. Works great. Exceeds expectations.-----27 Feb 2012Tech-dork here.EZOPower 10,000mAh battery, SKU 6U81030100512, ASIN B005XQSN9G.Also known as "Universal" "Anker"; Model AK-79UN5V2-B16P100A. These are the same: B005NGKR54; B005NGLTZQ; B005NGLBHM; B005NGNKNK; B005XQSN9G.When I say EVOPower, it includes the abovementioned "Universal" "Anker" labels. It's the same machine. I happen to have bought this battery that had an "EZOPower" label.Dimensions: 3-1/8" across x 5" deep x 15/16" high.Weight: 11 oz.12V and 9V.I bought this for iPhone, iPad (1), and iPod Touch. iPad (1) means the first iPad.I took a flight cross-country (roughly 12 hours total travel time), and wanted to listen to music on my iPhone while waiting for the planes and on the planes. I listened to music and watched the in-iPhone battery-indicator go from 100%, 85%, 70%, 55%, 40% in three hours. Depressing. I had to stop listening because I had to leave some juice for phone calls--not good to have a dead phone when traveling. It was an unpleasant trip--I had to ration the iPhone's battery--I felt cranky and couldn't relax cuz my Plan A pooped out and I had no Plan B. ARGH! I'm not about to let that happen again!----------------PLAN B----------------Now I have Plan B: EZOPower (Universal; Anker) 10000mAh battery.EZOPower (Universal; Anker) I've had it a few days. I rate it A+ (*****). However, the instructions are horrible, sucky, crappy, awful, abysmal, despicable (you get the idea); the manufacturer couldn't bother hiring a decent English translator; I feel the manufacturer threw me into the deep end of the pool without my first learning how to swim. Yesterday I tried to (re)charge my iPhone--nothing happened (unbeknownst to me, the EZOPower (Universal; Anker) was OFF; no blue lights shone)--I didn't realize it mattered that the EZOPower (Universal; Anker) be turned ON--the few lines of instructions the "manual" gave were undecipherable.-------------TEST 1-------------Accidentally having turned ON the EZOPower (Universal; Anker)(by pressing the center silver button where the blue lights/buttons were lit), the battery (re)charged my iPhone perfectly, while I had it playing music, in an unknown "fast" amount of time (I wasn't paying attention cuz I didn't know "ON" mattered). This means: make sure that if you're trying to (re)charge something, ***the blue lights must be ON (aka LIGHTED UP).***To turn the EZOPower (Universal; Anker) OFF (no blue lights), press the silver button--the battery doesn't shut off immediately--there is a short delay.Haven't tried it on my iPad (1) or iPod Touch. I'll post more when I know more. So far, this is a great battery.------------------------------TEST 2: NEXT DAY------------------------------I had iPhone and iPad (1) (re)charging at the same time, with the iPhone playing music. (I don't know why I had the iPhone playing music.) iPhone battery was down to 20%; iPad (1) battery was dead.2-hour mark (re)charging using EZOPower / Universal / Anker. Result: iPhone 91%. iPad (1): 23%. EZOPower / Universal / Anker: down to one blue light (of four). Maybe the iPhone playing music was too much for the EZOPower / Universal / Anker. It doesn't seem to matter which device is connected to "OUT 1" and "OUT S."3-hour mark (re)charging: iPhone is 100%; iPad (1) 39%; EZOPower (Universal; Anker) still has one blue light on. I detached the iPhone.3.5-hour mark (re)charging: iPad (1) 58%; EZOPower (Universal; Anker) one blue light blinking (which means it needs to get plugged in).The EZOPower (Universal; Anker) needs to be plugged in.When I plugged the iPad (1) into the "OUT S" port, the iPad showed "NOT CHARGING"; iPad doesn't recognize the OUT S port.I recommend it without caveat.

This device is a must for anyone likely to be away from a charge point for their device for longer than 4 hours. Bought the Ezo power pack for a trip to Europe. It kept my Galaxy 10 tab working for the entire, grueling, 10 hour flight plus 3 hours airport waiting time. Touring the castles and medieval towns of Europe, iPhone in hand taking pictures, the unit was fantastic, allowing me to continue taking photos for days at a time without needing to find a charge point - not an easy task in Europe since they've configured their power outlets in a way that prevents devices without 3" plug legs from accessing any power! So I simply recharged the Ezo in the car. In an emergency situation power is an urgent necessity and having a device like the Ezo, at the ready, is a good safety plan. In emergencies the very last message you need to read is "Low Battery". Now I'm back from Europe I keep the Ezo in the car with me, plugged in and fully charged so that when it's needed, it is there and ready. An added advantage to the multiple outputs and power options on the device is that you can use it to 'jump start' others stranded with dead batteries on their devices. In fact you can plug in several different devices all at the same time.

This product worked great while it lasted. I just happened to get a defective one. However, I have co workers who use this product often and haven't had an issue with theirs. They out to the field constantly and utilize it in garrison as well. Proving that it is durable and a reliable piece of gear. They've own theirs for a couple years now. I can't fault a company for one defective product out of the hundreds they've already sold. I will be reording this product to replace my defective one.

Never been happier. I travel a lot and purchased this to avoid searching and fighting for electrical outlets at airports. It works wonderful and was able to charge my phone, ipod and laptop on a single charge with energy to spare. Consider purchasing a backpack with a built in charger and am so glad I decided to buy this more powerful unit. After my purchase, friends have also ordered their own units.