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.
Essentially, it is a portable battery -like a lot of other ones I've tried. I have one or two that work quite well for me, but I'd had none that could reliably put out the 750ma needed to both run and charge my Mifi at the same time. This one did.
I dropped this in one pocket of my backpack, connected it to my 4G MiFi at 9am when I left the hotel room, and 9 hours later when I got back to the room it was still running, had 2/3 of a charge left in it, and the MIFI battery was still full. It was finally a "run all day and forget it" battery pack.
It worked fantastically for me at the show because of a few key features:
1. Though physically its not too big (about the size of a compact 3.5" external drive enclosure) it packs a 10,000mAh lithium polymer battery.
2. It has two USB power out ports that EACH put out 2.1 watts -as much as the power adapters for the iPad and Galaxy Tab 10.1. The USB standard is 1/2 watt which is why most of these battery packs don't properly charge and run (at the same time) an iphone or mifi let alone an iPad.
3. One of the USB ports is marked with an "I" for iPad and is rigged so that it tells the iPad/iPhone etc. that it is an Apple charger. The device recognizes it as a charger and pulls the full fast charge. The other is marked with an "S" for Samsung and does the same thing for a Galaxy Tab 10.1 etc. This is the ONLY external battery or charger I've seen which can do this. Both ports also work for anything else I've tried.
4. It is elegantly simple, but has all the features you want. For example, it has lights to indicate it is on or off, charging or not charging, and how much power is left in it. It will shut off on its own in 10 seconds if nothing is drawing power (preventing it from draining accidentally in your bag).
5. It is attractively built, with a mirrored finish and bumpers on the side. It is compact and solid feeling with no sharp edges and nothing it doesn't need. It has no huge ugly labels or decals.
6. It comes with pretty much everything you need. It charges with 12v DC so along with the small block adapter, it comes with a cigarette lighter adapter to charge it in your car. It also has a DC output port that can push out 9v or 12v and a wide variety of output tips for common devices off that port.
MY ONLY COMPLAINTS with this device are:
-1 : The instructions are written in a nearly incomprehensible East-Asian-English attempt that leaves you scratching your head. Fortunately, there is very little you really need from the instructions to use it properly.
-2 : It doesn't come with a little cloth bag or case to hold it along with the various tips and such that it has. This is easily handled by finding a cloth bag of my own.I purchased two units for a trip that I was taking to reduce the number of chargers that I would be taking. I used this charger for a couple weeks before my trip and it seemed most excellent -it had all of the features I was looking for a external backup battery pack.
It would not charge my ASUS Transformer TF101-A1 10.1-Inch Tablet (Dock Sold Separately) nor ASUS Transformer Prime TF201-B1-CG 10.1-Inch 32GB Tablet (Champagne) with or without the keyboard attached -but that was NOT the end of the world.
However, the bad news was that about half thru my trip the power supply got very hot and stopped charging the batter pack. It turned out the charger was burned out; I proved this when I get home by using the power supply from the other unit. So the key is to NOT charge the battery pack at the same time as are charging your USB device. This is a flaw in its design. This product is also sold under the Anker(R), XTPower and others as well.After trying no less than 3 other battery backup devices, I have finally found one that will charge the Kindle so I won't get stranded on a trip without my books & movies. Apparently, the Kindle Fire needs some serious amp-hours to charge it up. The ZaggSparq 2.0 did not cut it, but this one at 10,000 mAH actually turns the battery icon green. The unit is solid, and appears to be well made. The user instructions are pretty bad english, but good enough to figure out. There is a switch on the side that lights an indicator to read either 9V or 12V, which bothered me a bit because I thought USB was 5V, but it seems to work. I don't have an iPad to test it with, but it charges my iPhone just fine. Lights on the front tell you when the unit is charging from the wall socket, and they go out when its all charged up. They give you a ton of adapters too which is nice, but I'll only ever use the usb cables that I already have. There is also a 12v car charger which is a nice touch. I would prefer a built-in wall charger to the wall plug, but I think the unit is too thin for that, so I can live with it. I would definitely recommend this device to anyone with a Kindle Fire.
Success: I full charged the Kindle Fire last night, so this device does exactly what I had hoped. The device did NOT work with the original Kindle cable, which is strange. It would begin charging, then stop. However, when I used the small coiled USB cable that came with the power pack it worked perfectly. Again, highly recommend this device to anyopne with Kindle Fire.
Update 4/30/12 this device works nicely with the iPad 2 as well..
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2 May 2012
Two months later, I still recommend this battery. No problems. Works great. Exceeds expectations.
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27 Feb 2012
Tech-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!
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PLAN B
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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.
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TEST 1
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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.
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TEST 2: NEXT DAY
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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.
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