Android 
2 Comments TeckNet iEP392 Dual-Port 12000mAh External Power Bank For Apple iPad 2, iPad, iPhone 4G 4GS, iPhone 3G 3GS, iPod Touch (1G 2G 3G), Motorola Droid X Eris, HTC EVO Android Phones, Blackberry (Curve, tour, storm, bold)- Black Reviews
- 12000mAh Advanced Li Battery Technology, 43 hours movie time for iPhone 4/4S and 11 hours movie time for 3G iPad
- Dual Port USB Outputs: 5.5V 1A and 5V 2.1A, Can charge two devices at the same time (Only one USB Charging cable included)
- 4 Integrated LED Power status indicator lets you know how much power is left
- Ultra light weight 300g, dimensions: 108*105*23mm
- Come with UK USB Power adaptor anda 7 set of changeable connectors, so you can power and recharge your for most Smart Phones such as HTC, Apple, Samsung, LG plus any iPad, tablet, PSP, MP3 Plays or camera.
Product compatibility:
The TeckNet iEP392 can support most of mobile devices which require 5V 1A-2.1A input. If the connector is not included in the list, please use the original USB cable supplied from your mobile device.
iPad Compatibility: support all iPad and iPad 2 model
iPhone Compatibility: iPhone 2.5, iPhone 3G, iPhone 3GS, iPhone 4, iPhone 4S
iPod Compatibility: Support most of iPod music players with the dock connector: iPod Classic(All), iPod Mini, iPod Nano(All models) , iPod Touch(All)
Incompatibility: cannot support those devices which are compliant with the USB dumb charger specification, such as Nokia N900, Samsung Galaxy Tablet, Blackberry 9900. This problem can be resolved by using a dedicated charge cable with the USB data pins shorted (e.g. USB dumb charger plug adapter)
List Price: £33.98
Price: £33.98
Super for the price & so versatile,
Let me start by saying I have tried many battery backup devices in past, all of which have been sub standard, so when I saw this little beauty I looked at it many times before buying due to being skeptical about it.
But alas I went and bought it and I am so very glad I did.
I will start with Negatives first, and about only real negative I have found so far is that it takes a long time to charge up, but having said that, with the large capacity it has, that can’t really be classed as a negative, but I know many people would consider it one.
Now for positives:
1st the charging is done by usb cable, not a 35mm jack like a lot do, and that comes supplied with a 3 pin plug to usb adapter, so you can use that for many other devices like mp3 players and other things you normally have to charge via computer’s usb.
comes with many attachments, so covers pretty much every device you can think of.
Things I have tried so far:
game pads for ps3,
nokia n97mini smartphone
mp3 player
I left phone connected to device when i went sleep, phone fully charged and it still on 5 led’s
Another positive is that it has an in built led torch, and from a full charge it says it can last up to about 540 hours.
Another good thing is, because it all usb based, if it not got an attachment for your device, as long as your device has a usb lead of it’s own, you can use that too.
I would highly recommend this device, and this seller, delivery was fast and reliable.
I am seriously thinking about buying a 2nd one of these it that good.
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|Very good, but doesn’t deliver 12,000mAh,
This is, certainly, an amazing piece of kit. The amount of power it packs into a sleek case that will fit in the back pocket of your jeans is truly impressive, and for the price (under 35 pounds at time of writing) it’s an absolute bargain.
However, I do have one niggle: It wont provide 12,000mAh.
Now, I have to say that I’m using this for a totally unsupported purpose; namely, to run a set of LED bike lights. Two sets, actually. The stock battery that came with each was a 6V / 2,400mAh unit of nearly the same size and weight as this TeckNet unit, so this will run twice as many lights for far longer without a weight penalty. Happily the 6V lights work perfectly on 5V or 5.5V, so a minor adaptation of a USB cable and hey presto, one of the best bike light batteries you could wish for.
This in turn led me to my findings about its usable capacity. The lights draw about 550mA according to my multimeter. A quick bit of maths should tell you then that a 12,000mAh battery should run the lights for about 22 hours between charges. In fact, the run time is about 14 hours (yes, I know, still longer than any night ride!), meaning about 7,700mAh of usable capacity.
I questioned this with the seller and very promptly they replied and reminded me about the inefficiencies of charging batteries; when you charge a battery it gets warm as, while most of the power charges the battery, 30-40% will be lost as heat. Which is fine, except, (a) I wasn’t charging a battery, and (b) I was measuring the current flow from the battery to the load. What it did when it got to the load, I have no care (and neither does it), the point is that the battery put out 550mA for 14 hours before it became sufficiently discharged to turn itself off.
I suspect that the truth may have more to do with the clever electronics inside the unit. The instructions say that the output is shut off when the battery voltage drops below a certain value; my suspicion is that this value is reached significantly before the actual chemical cells are exhausted. In other words, the cells may well have a 12,000mAh capacity, but the electronics prevent you from getting much more than about 60% of that capacity out of them. On the plus side, those clever electronics keep the output voltage constant throughout the discharge, as is required for a USB supply; this means the lights stay on full brightness until they switch off.
I have no reason to believe this discrepancy is unique to this battery; it wouldn’t surprise me one bit to learn that all similar batteries did the same, and, had I only ever used this to keep my phone charged when away from the mains for long periods, I’d probably never have discovered any of the above, and I’d have nothing but praise.
Speaking of which, I am buying a second one, for its advertised use this time, because despite the above niggle, the capacity/size/weight/price combination of this thing is still amazing – just be aware that the quoted capacity does not reflect the usable power while you’re adding up what you want to charge or run from it.
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