Poweradd™ Pilot X1 5200mAh Portable Charger Backup External Battery Power Pack with LED Flashlight for iPhone 5S, 5C, 5, 4S, 4, iPad Mini Retina, iPod (Apple Adapters Not Included), Samsung Galaxy S5, S4, S3, S2, Note 3, Note 2 and Most Other Android Smart Phones, Gopro Cameras, PS Vita and More Other Devices..
Grab Now Poweradd™ Pilot X1 5200mAh Portable Charger Backup External Battery Power Pack with LED Flashlight for iPhone 5S, 5C, 5, 4S, 4, iPad Mini Retina, iPod (Apple Adapters Not Included), Samsung Galaxy S5, S4, S3, S2, Note 3, Note 2 and Most Other Android Smart Phones, Gopro Cameras, PS Vita and More Other Devices By Poweradd™
Most helpful customer reviews
97 of 104 people found the following review helpful.
By NLee the Engineer
I need a portable charger for my Samsung Galaxy S3 and various Android tablets. Previously I have had good results with two other Poweradd products I purchased, so I decided to try this Poweradd LE011 5200mAh Power Bank with LED Flashlight.
There are many cheaply-built power bank units with poor output regulation and inflated battery capacity ratings. That's why I conducted a test to measure the true capacity of this Poweradd unit.
First, I made sure that the internal battery pack was fully discharged and recharged for several cycles. Next, I connected a 5-ohm power resistor as load to the USB port, and measured its output voltage and current over time. Here is what I have observed:
- For the first one hour, the unit generated a very well-regulated 5.02V at 0.96A, or 4.8W of output power
- After 70 minutes, however, the output voltage (hence power) starts to drop linearly with time. It dropped from 5V down to 4.75V over the next 100 minutes
- Right after 172 minutes, the power cut off completely.
(see the chart I uploaded to 'Customer Image' section for details)
Based on the above data, I can estimate the internal battery capacity through energy calculation:
- Average output power = 4.7W
- Runtime = 172 minutes
- Total output energy = 4.7*172/60=13.47Wh
- Assuming conversion efficiency of 80%, input energy required = 18.84Wh
- At 3.7V, the internal battery's capacity = 18.84/3.7 = 4.55Ah
Therefore my measured battery capacity is 4550mAh, or 88% of the advertised capacity. To put this capacity number in perspective: it is enough to recharge the 2100mAh battery in my Samsung Galaxy S3 for 1.5 times (since part of the energy is lost during conversions). By the way, my other two Poweradd products also show slight discrepancy between their measured and rated capacities:
- The Poweradd 2600mAh Ultra Slim Power Bank with Mini USB flashlight has a measured capacity of 2490mAh, or 96% of rated value.
- The Poweradd 5000mAh Dual-Port External Backup Battery Pack has a measured capacity of 4380mAh, or 88% of rated value.
The battery status indicator is very good. It uses 4 LED 'dots' to give a fairly accurate indication on the remaining battery capacity. Based on my observation:
- 4 dots = 77-100% (approximately)
- 3 dots = 57-76%
- 2 dots = 39-56%
- 1 dot = 21-38%
- 1 blinking dot = below 20%
The LED flashlight, on the other hand, is very disappointing. The light is so dim that it is weaker than any of my keychain LED flashlights. In fact, the blue status indicator from the other 5000mAh Poweradd unit is about equally bright.
Overall, I consider this Poweradd unit a good value (4-star). I would give it a 5 if the LED flashlight were a little more powerful.
[Update on Oct 28, 2013]
I tested the PowerBot PB5600 5600mAh Power Bank which is currently available at the same price. The PowerBot unit offers 10% higher capacity and a more usefull LED flashlight. The Poweradd unit still has the advantage of being more compact.
63 of 70 people found the following review helpful.
By M. Erb
Watch Video Here: http://www.amazon.com/review/R2RY3HU9U6NNY7 The Poweradd 5200 mAh battery pack is a nice blend of compact size with a good amount of capacity. The size is 3.46x0.87x1.6 inches and it weights just a smidgen over 4 ounces.
Included with the batterypack is a 29" USB to MicroUSB cable and a micro-AC charger (100-240V, 50/60Hz).
The powerbank has a single 1A USB output and is charged via a MicroUSB port with the included USB cable and micro-AC charger. You are also able to charge the powerbank from a computer USB port but it will charge more slowly. You can use the powerbank at the same time it is being charged.
There is a built-in LED flashlight that is turned on and off by a long press of the power button on the powerbank. The light is quite dim but useful nonetheless.
When you press the power button a single time, the LEDs indicate the relative state of charge of the batterypack. When charging the batterypack, the LED's will blink.
The batterypack performed on par with other good performing batterypacks that I've tested. My iPhone battery was charged at a rate of 10% increase in battery charge every 10 minutes. At that rate it would take about 1.5 hours to fully charge a depleted iPhone battery. The battery pack takes about 6-7 hours to fully charge using an AC charger.
I like the size and power capacity of this powerbank. It would have been nice if a couple different tips were included, like an Apple 30-pin connector and a MiniUSB tip. There was also no carry bag included. But in spite of that this is a good performing batterypack.
I was provided a complimentary sample for testing and review purposes. I agreed to provide a fair and honest review. If you have any questions leave me a comment and I'll do my best to answer.
22 of 25 people found the following review helpful.
By Chelsukun
I am Super pleased with this mobile power bank. It has already served and saved my phone from dying many times. The model I received was the POWERADD LE-011 5200 mAh with one USB out. For the size that it is I am shocked at how much it can do.
Out of the box it came fully charged and took my phone (GS3) from 11% to 100 % in only 2 hours. This was with WiFi on but in standbye. For only two hours of wait and only two of the 4 lights down, it granted my phone an additional 10 hours of life.
This product is not hard to use. You plug it in to your device using either the USB to MicroUSB cable provided or one that you provide and charge your device. What happens when the LE-011 is out of juice? No problem, plug it into your computer or using the AC plug provided plug it into your wall outlet. The charging time varies only by 1 hour. Between 5 and 6 hours for full charge.
How about those high demand activities that drain your battery faster than you can find an outlet? No sweat for the LE-011 with 5200 mAh and 1A out of power you will be perfectly fine. I was able to save my phone from 3% of battery and charged it up to 100% in roughly 3 hours and it drained the LE-011 to 1 light left. All of this I did while streaming video, music, using GPS and WiFi. Sounds bad right? I don't think so because like I said before I now have another 8-10 hours on my regular battery.
The bad well if you get sad about only charging one device at a time, well you are probably packing your bag a little too tight. Yes it only has the 1 output but thats all that is necessary for something this small.
This external batter is worth the money. A lifesaver when you need it and a convenience when you want it. Definitely would recommend. And will probably purchase in the future.
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