I received PowerGen wall charger for testing from the manufacturer to write an honest and unbiased review and you will find both pluses and minuses of my experience in this review.
I am attaching two collages with 8 photos (each collage has 4) labeled with numbers 1 through 8 under customer photos that I will be referencing in this review.
The first thing I noticed that the charger has re-tractable prongs which is very handy for travel. Photo #1-1 shows the black plug with prongs retracted, and the white plug with progs extended.
Photos #1-3 and #1-4 show this plug on a power strip. This is where the only negative thing I have to say about this plug comes in. The position of the prongs is such that this plug takes up two and a half slots. As you see not only does each plug cover two outlets, I also could put two of these plugs next to each even on the short side. The prongs are not polorized as you can see on photo #1-1. The plug itself is very slim, if the prongs could have been oriented differently, the plug would only take 1 slot.
The plug has two ports labeled "A" and "NA" which stands for Apple and Non-Apple devices. I own all Android devices but I tested both ports to see their behavior with my devices. The charger comes without a USB cord, so tested it with the USB cords that came with my devices.
I used Battery App by Elvison to determine how each device recognized the charging source. 'AC' status means the charging is at full charging rate. 'USB' status indicates charging at a lower charging rate. 'Discharging' status means that the charging rate is below the power that the device is consuming so it slows down the discharge rate but does not re-charge.
The key findings:
- Excellent results on both ports for Nexus Phone and Nexus 7 Tablet
- Samsung Galaxy 7.7 can be charged on NA port
- Better results than 10w PowerGen wall charger
The table below summarizes my findings:
Nexus 7 Tablet (photo #2-2, note the port is labeled "A" is closer to the edge of the plug and the port labeled "NA" is the one that is further away from the edge of the plug)
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A port -- AC
NA port -- AC
Samsung Galaxy Nexus Phone
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A port -- AC
NA port -- AC
Samsung Galaxy Tablet 7.7
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A port -- discharging when screen is on, charged slowly with screen off
NA port -- AC
SanDisk Sansa Clip+ MP3 Player
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A port -- charged at AC rate
NA port -- charged at AC rate
Charging times for Samsung Galaxy Tablet 7.7
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NA: from 90% to 100% ---> 33 minutes
A: from 90% to 100% -> 1h 37 min charged when screen was off despite saying discharging (powering the screen was enough to turn from slow charge to discharge)
Samsung plug that came with the 7.7 Tablet: from 90% to 100% ---> 1 hour
Charging times for Nexus Tablet
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NA: from 94% to 99% ---> 17 minutes
A: from 94% to99% ---> 19 minutes
The behavior of both Nexus 7 and Galaxy Nexus plugged in at the same time was the same as when they were plugged in individually. This means if you can charge them both together at the same time. If you need to charge Samsung Galaxy tablet and one of the Nexus devices you would need to put the Galaxy tab on the NA port.
The MP3 player worked in both ports. I was able to charge and listen to the MP3 player at the same time.
To summarize:
I liked:
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1. Excellent behavior on both ports even when you have two Android devices
2. Samsung tablet 7.7 charged twice as fast as with the plug that it came with
2. Solution for MP3 player with built-in battery
3. Can charge two devices
I did not like:
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1. Position of the prongs that makes the plug 2+ slots on the strip
Overall, This plug has given me the best performance of any dual plug I have tried. I recommend it.
You can find it on Amazon by following this link.
Ali Julia review ★★★★★
Update: I recently noticed that the seller upgraded the charger but kept the same ASIN number (so that the old ratings and the number of total sales remain with the product). So some early reviews, like this one, are talking about a totally different product.
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