Portable Charger RAVPower 6700mAh (2.4A Output & 2A Input) External Battery Pack iSmart Technology for Smartphones Tablets and more - Black
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- 2X Faster Charger: 2A input can save half of the time to fully charge the 5200mAh portable charger ( please use a 2A or higher output charger); 2.4A output makes it charge other devices 2X faster than other chargers. The maximum input and output for the fastest and strongest charging experience.
- Exclusive iSmart Technology: Charge faster and smarter than others, automatically detects and delivers the optimal charging current for any connected device- ensuring the fastest and most efficient charge.
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RAVPower NEW Luster 5200mAh is a compact power bank charger with plenty of juice to charge your device. This portable external battery pack provides a much needed battery to charge your device and help you to stay connected. Wrapped inside an alloy shell is RAVPower industry leading A+ grade lithium-Ion battery cells with over 500 certified charging cycles. A multi-level protection system circuitry will help to prevent any accident happening to your device. This great RAVPower portable charger is available in four fun colors. Each pack comes with:-- 1x RAVPower 5200mAh portable charger -- 1 x Micro USB cable - 1x User Manual
From the manufacturer
|3rd Gen Deluxe 16750mAh External Battery Charger||3rd Gen Deluxe 13000mAh External Battery Charger||Element 10400mAh External Battery Charger||Deluxe 7800mAh External Battery Charger||Luster 6700mAh External Battery Charger||Luster 3350mAh External Battery Charger|
|Color Selection||Black||Black||Black, White||Black||Black, Blue, Pink, Silver||Black, Blue, Pink, Gold, Sliver|
|Other Feature||iSmart dual USB output LED flashlight||iSmart dual USB output LED flashlight||iSmart dual USB output||iSmart USB output||iSmart USB output||Aluminium alloy shell|
|No. of iPhone 6 charges||6.2||5.7||3.8||3.2||2.3||0.95|
|No. of iPad Air charges||1.1||0.95||0.8||0.57||0.48||0.2|
|No. of USB Charging Ports||2||2||2||1||1||1|
|Max Charging Speed||4.5 Amps||4.5 Amps||3.5 Amps||2.4 Amps||2.4 Amps||1 Amp|
|Size||5.00 x 0.88 x 3.20 inch||5.00 x 0.88 x 3.20 inch||5.47 x 0.87 x 2.24 inch||3.86 x 0.87 x 2.44 inch||3.5 x 0.91 x 1.69 inch||3.9 x 0.92 x 0.92 inch|
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Day 1 Charging Results
- 60 minutes = 20% to 82%
- 75 minutes = 92%
- 90 minutes = 97%
- 95 minutes = 99%
- 98 minutes = 100%
Day 2 Charging Results (almost identical)
- 60 minutes = 20% to 82%
- 75 minutes = 92%
- 90 minutes = 98%
- 95 minutes = 99%
- 100 minutes = 100%
Day 3 Charging Results
- 60 minutes = 20% to 82%
- 75 minutes = 92% (charger fully discharged)
WEIGHT & DIMENSIONS - It weighs slightly more than an iPhone 6 (4.8 oz vs 4.55 oz). Also, if you click on any color except the black one, you’ll see incorrect dimensions of 5.2 x 3.2 x 1.5 inches. That’s the size of the shipping box, not the charger which is 3.5 x 1.6 x 0.9 inches.
LED CHARGING INDICATOR LIGHTS - I had 3 LEDs left after the first charge, but only 1 LED after the second charge despite having what turned out to be about 31% of charging power left, so the lights may not be precise in telling you what you have left.
INDICATION THAT THE BATTERY PACK IS ALMOST DEPLETED - Somewhere between 5 to 10 minutes before the battery reached full discharge of the last 2% or so, one blinking LED light came on by itself and stayed blinking until the charger died. So if you see that blinking light go on by itself and stay on, it’s your warning that you are almost at full discharge and it’s probably a good idea to unplug then, as I don’t believe it’s good for the charger to be fully discharged too much.
CHARGING TIME FOR THE RAVPower 6700 mAH - It took just under 4 hours to recharge this battery pack from a full discharge to 100% using the provided USB cable and a RAV wall charger I also purchased. Not sure if this is good or not, but perfectly acceptable to me.
BACKGROUND (more technical - feel free to skip if not of interest).
After a friend gave me a 2200 mAh capacity charger he had laying around, I didn’t initially understand enough about these to know why it would only give my iPhone 6 with an 1810 mAh capacity a partial charge of 60% or so. So I started researching for one that (a) had a small form factor I could fit in my pocket, and (b) enough juice to actually charge my battery twice if needed while traveling without having to look for an outlet.
Once I started researching, I learned that what you can actually get out of ALL brands of these type lithium batteries is always significantly lower than the listed raw power. So what should we expect? Finding this explanation from a RAV employee responding reviews helped.
"The voltage of the battery cells is 3.7V, however, the output voltage of the power bank is 5V. You must allow wastage when the voltage increases. And in the market, the average efficient of the power bank is about 75%.
So the actual capacity of the power bank should be:
Labeled capacity *3.7V /5V * Efficient = 6700*3.7/5*75% =3718mAh”
If I understand this correctly, with a charger with 3.7V output with 5V input, you should subtract about 26% (3.7/5 =74%) off the top. In addition, RAV is saying that the industry standard for efficiency of that remaining capacity is 75%, so subtracting another 25% from the remaining power will give you a rough estimate of how much total juice to expect.
So for this 6700 mAh battery, 6700 x 74% - 25% = 3718, which would charge and iPhone 6 with 1810 capacity just over twice. I found other sites that said you should expect to lose 10 to 15%, so RAV’s 25% estimated loss seemed high and I decided to do the charging experiment you see above.
I topped off the charger completely full, then ran my phone battery down to exactly 20% for 3 days in a row using the RAV charger to charge it back up each day. Assuming I’d use approximately 1448 mAh each of the first 2 days to fully charge the phone from 20% to 100% (1810 x 80% = 1448), at the end of 2 days, I should have had another 822 left of the 3718 to take the phone up another 45% from 20% to 65%.
BUT . . . . it was a pleasant surprise that the phone charged all the way up from 20% to 92% on the 3rd day, which equates to about 1303 mAh. That would mean I got about 4200 mAh of “juice” out of the charger over the 3 days, which equates to slightly more than 2.3 full phone charges (1810 x 2.3 = 4163), which is exactly what RAV’s literature states.
As you can see from my charging results above, it took much longer to charge the last 10% or so, but this is expected behavior as your phone gets closer to full charge. I’ve read that chargers deliver the largest output when your phone has no more than a 20% charge and the smallest output after reaching 80%-90% when the charger has to work harder pushing the last percentage in, causing wasted energy, and that you can possibly get more charging juice with less waste if you stop charging the phone between 80% - 90%. If I’d done that, I may have gotten even more than 4200 mAh out of it. There are also other factors that may cause more or less efficiency, such as the length and quality of charging cord, so this is not an exact science and nobody can tell you exactly what YOU will get.
In sum, I’m VERY happy with this charger and look forward to getting some good use out of it on an upcoming trip. I can get almost 3 charges from 20%, it small and light, looks great, and the included pouch holds both the charger and my 3 foot iPhone lightning cable making it easy to slip into my pocket. I don’t think you can do much better for the price.
I have two RAVPower external battery chargers and both appear to be very well made, better than others that I have used. I would not hesitate to recommend them to friends and family.
5200mAh gives me a little less than two full charges on my Note 5 (which is the reason I bought this due to the lack of removable battery). Although the Note 5 battery is much better than expected, quite good actually, having this as a backup helps greatly. When traveling about in NYC, I usually run down the battery on my phones pretty quick with searches, GPS, emails and pictures, so this will come in handy.
Comes with a nice little carry pouch and USB cable
Some excellent features:
2A Input & 2.4A Output
Charge indicator lights
I added a picture of the battery pack next to a Samsung Note 3 for size comparison
Hopefully the unit holds up well over the long haul, we'll see, but so far I love it for the power and size.