Review: Vinsic 20000 mAh Powerbank

Hey gadgeteers, it's been almost a month since my last review. So, here you have another review for Vinsic 20000 mAh Powerbank.

This review represents my personal and unbiased view on Vinsic 20000 mAh Powerbank. In this test I will evaluate everything I think is important for consumer – consumer experience.

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What's in the box:

-          20000 mAh powerbank

-          Micro USB charging cable

-          Thank you card.

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First impressions: powerbank arrived in nice and secure packaging. Right out of the box, the powerbank feels high quality. It's the best looking powerbank I tested to date. It's covered in aluminum alloy which gives powerbank cold, high - end feel. The dimensions of the unit are: 17.4 cm x 12.2 cm x 1.3 cm (L x W x H). Yes it's very slim. Because of aluminum body, the unit is also fingerprint – resistant.

On the side there are 2 USB output port (1x2.1A, 1x 1A), the USB input port, which is 2A and power display. »Power button« here is different that on any other powerbank I tested. Actually there is no physical button, but touch enabled surface which tells the amount of battery capacity left in powerbank (you have to slide over this touch enabled area). What I like is, that power display shows you battery level in percentages. It's the first time I've seen that feature in the powerbank.

Powerbank is FC, CE and ROHS certified.

Test: powerbank is very easy to use. When you plug device in, powerbank starts charging it automatically. If you want to check battery level, just slide over touch enabled area. LED Indicator will go automatically off in few seconds.

Battery efficiency: with first fully charged powerbank I was able to charge: Note 4 from 27 – 100%, Nexus 10 from 0 – 100% and ipad mini retina from 38 – 70 %. The battery sizes of those devices are 3220 mAh, 9000 mAh and 6471 mAh respectively.

2350 mAh + 9000 mAh + 2070 mAh = 13420 mAh.

13420/20000 = 0.67

That means that the battery efficiency was 67%. I found that efficiency ratio solid. It takes few battery cycles, before powerbank reach its full potencial of battery efficiency.

Charging time: because of its size, powerbank was fully charged from 0 – 100% in 12 hours. Charging input speed is around 1650 mAh per hour.

Output charging speed: Note 4 was charged from 27 – 100% in 1 hour and 45 minutes. Charging speed was around 1350 mAh per hour.

Simultaneous charging: I charged Note 4 and iPad mini retina at once. There was no decrease in charging speed.

Compatibility:  it charged all devices I plugged in. Beside devices I mentioned above, I also charged Nokia Lumia 520, iPhone 5s, Bluetooth speaker and Sony Bluetooth headphones.

Overheating issues: during my tests, I didn’t notice any overheating issues.

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Conclusion: This is one of the best big powerbanks I tested. The design is great and the performance is solid. This is great choice to anyone who is looking for high capacity powerbank, you won’t be disappointed.

Recommended!

Review: Vinsic 6000 mAh Portable Powerbank

This review represents my personal and unbiased view on Vinsic 6000 mAh Powerbank. In this test I will evaluate everything I think is important for consumer – consumer experience.

What's in the box:

6000 mAh Powerbank;

 micro usb cable.

First impressions: Item arrived in nice – eco package. Powerbank is great looking device. It's made of aluminum alloy, which gives powerbank very high-end feel and protects nicely from fingerprints. It's very compact built and it fits nice in the hand. On the front of the unit, there are power button, 2.1A micro USB output port and 1.5A micro USB input port. On the edge there are four led indicators, that represents battery capacity. Each indicator stands for 25% of the battery power. The dimensions of the powerbank are: 9.3 cm x 5.2 cm x 2.1 cm (L x W x H).

How it works: Powerbank is really easy to use. When you plug device in, powerbank starts charging it automatically. If for some reason doesn't start charging automatically, just press power button once and it will start. When only one indicator is flashing, it means that powerbank has only 5% of battery capacity left and you have to charge it first.

Test:

Battery efficiency: with first fully charged powerbank I charged my Nexus 10 from 54 -100%. Nexus 10 has 9000 mAh battery size. So this means 4140 mAh. Battery efficiency with first full discharge was 69%, which is solid. It takes few battery cycles, before powerbank reach its full potencial of battery efficiency.

Charging time: powerbank was fully charged (0-100%) in 3.5 hours, using desktop charger with 2.1A of output power. This means approximately 1715 mAh per hour.

Charging speed: for charging speed test I charged Note 4 from 37 – 100% in 1h and 20 minutes. Charging speed is approximately 1520 mAh per hour, which is very good charging speed.  

Compatibility: I haven't had any problems charging any device with this  powerbank. Beside already mentioned devices I also charged bluetooth headset, bluetooth speaker, Samsung Galaxy S4, Nokia Lumia 520 and iPhone 5S.

Overheating: I haven't noticed any overheating problems with this powerbank.

Conclusion: I am really satisfied with this powerbank. Powerbank is great designed,great performance and very affordable.  Because of its size you can simply put it in your pocket or bag. I can definetly recommend this powerbank to anyone, who looks for high quality powerbank.

This product was sent to me from Vinsic for the review. 

Check out their facebook fan page: https://www.facebook.com/VinsicFansPage?fref=ts

Review: Vinsic Tulip 3200 mAh Powerbank

This review represents my personal and unbiased view on Vinsic Tulip 3200 mAh Powerbank. In this review I will evaluate everything I believe is important for the consumer – consumer experience.

What's in the box:

-          3200 mAh powerbank;

-          Micro USB charging cable;

-          User manual (read it!)

First impressions: Powerbank arrived in nice eco – friendly package. Powerbank itself is high quality made and its design looks really premium (the surface of the powerbank is covered in aluminium). The dimensions of the powerbank  are 9.4 cm x 2.2 cm x 2.2 cm. On the top there is a power button and four indicators. Each indicator represents 25 % of the power capacity (1 indicator flash = 0-25%; 2 indicators flash = 26-50%; 3 indicators flash = 51-75%; 4 indicators flash = 76-100% of the power capacity). On the front side there is one Micro USB input (1A) and one Micro USB output, which power is  also 1A.

How it works: Powerbank is very simple to use. It will start charging automatically, when the device  is connected. If for some reason doesn't start charging automatically, just press power button once. When one led light is flashing it means that battey needs to be recharged.  When powerbanks is fully charged, the led indicators will become solid on.

Test: 

• Battery Efficiency Test : the first thing I always do is to measure battery efficiency ratio. I was able to charge my ipad mini retina from 2 - 35 % (ipad was on airplane mode). After that powerbank ran out of power. Ipad mini retina battery size is 6471 mAh. 33% of 6471 mAh =  2135 mAh. Battey efficiency of this powerbank is 2135/3200mAh = 67%.  
• Charging time: powerbank was fully charged from 0 - 100% in less than 3 hours. 
• Charging speed test: Note 4 was charged from 33 – 84% in 1.5 hours. This means approximately 1100 mAh/ per hour. That is solid charging speed. 
• Compatibility:  Beside ipad mini, I had no problem charging iPhone 5s, Note 4, Nokia Lumia 520, bluetooth Sony headset and HTC Desire X. 
• Overheating YES/NO: I haven't noticed any overheating issues whatsoever. Powerbank gets a little warm when charging, but this is normal.

Conclusion: Overall I am very satisfied with the design and performance of this Vinsic Tulip 3200 mAH powerbank and I recommend it to anyone who is looking for pocketable powerbank. It will fully charge your iPhone (except iPhone 6 plus). 

This powerbank was sent to me for the review. Opinions are my own and unbiased.

https://www.facebook.com/VinsicFansPage?fref=ts

Review: EasyAcc 10400 mAh Powerbank

This review represents my personal and unbiased view on EasyAcc Powerbank 10400 mAh. In this test I  evaluated everything I think is important for consumer – consumer experience.

What's in the box:

-          10400 mAh Powerbank

-          2x micro usb cable

-          User manual (read it!)

First impressions: Item was delivered in secure package. Powerbank itself is great looking device. It's made of aluminum body, which gives powerbank very high-end feel. It's very compact built and it fits nice in the hand. The dimensions of the powerbank are: 90x77x21.5 mm. The unit is also fingerprint –resistant. On the front of the unit, there are power button, 2 USB output ports (1x1A, 1x2.1A) and micro USB input port. There are also four indicators, that represents battery capacity. Each indicator stands for 25% of the battery power.

How it works: Powerbank is really easy to use. When you plug device in, powerbank starts charging it automatically. If you want to check battery level, just press power button. Indicator will go automatically off in few seconds. Powerbank must have above 5% of power capacity to charge your device. The powerbank has under 5% of the power capacity when one indicator is flashing. Because there are 2 output ports (1A and 2.1A), you can charge 2 devices simultaneously. I recommend charging tablets with 2.1A USB output port. It will charge them more quickly.

Test:   

• Battery efficiency: with first fully charged powerbank I charged 50% of Nexus 10, 30% of ipad mini retina and 36 % of nexus 7 (2012). All of them were charged separately.  Battery efficiency with first full discharge was 72%, which is great. It takes few battery cycles, before powerbank reach its full potencial of battery efficiency.
•  Charging time: powerbank was fully charged (0-100%) in 6 hours, using desktop charger with 2.1A of output power. This means approximately 1730 mAh in one hour.     
• Charging speed: In one hour, powerbank  was able to charge Note 4 from 13-63%. This is approximately 1610% mAh in one hour.
• Compatibility: I haven't had any problems charging any device I put in the powerbank. Beside already mentioned devices I also charged bluetooth headset, bluetooth speaker, Samsung Galaxy S4, Nokia Lumia 520, iPhone 5S, ipod nano and garmin gps watch.     
• Simultaneous charging: it is working properly, I had no problems charging two tablets simultaneously (ipad mini 1gen, ipad mini 2gen).    
• Overheating: no overheating problems, even when charging two devices simultaneously. When charging battery itself, I also haven't noticed any change in temperature.

Conclusion: I am really satisfied with this powerbank. It's the best powerbank I used to date. Powerbank is great designed and with great performance. I am especially satisfied with charging speed of the powerbank, which is really fast. I most definetly recommend this powerbank to anyone, who looks for beautiful and powerful powerbank. 

Review: Levin 12000 mAh Solar Charger

This review represents my personal and unbiased view on Levin 12000 mAh solar charger. In this test I will evaluate everything I think is important for consumer – consumer experience.

What's in the box:

•  12000 mAh solar charger
•  Carabiner
•  Micro USB cable
•  30 pin Samsung adapter
•  User manual (read it!)

First impressions:

Solar charger is very nice looking device, with rubberized edges which protects charger from accidental drops. Solar charger is also water – resistant. On the front there is 1.7W monocrystalline solar panel, power button and four led battery indicators. Every indicator represents 25% of power capacity. On the side there are 2 micro usb output (1A) and one input (1A), which are sealed with cap, to ensure water – resistant structure. Powerbank has also built in led torch. Led torch has two different modes: normal and flashing light.

How it works:

 There are two ways to charge this powerbank, via built-in solar panel or via external power source, using micro usb cable. Powerbank is really simple to use. Plug in device you want to charge and click on power button. If you want to use led torch, press power button twice, and if you want flashing light, press power button one more time. To turn it off, double press power button again. When battery level on solar charger is low, one blue indicator starts to flash. If you charge it via solar energy, one indicator turns green.

Test:

•  Solar charging: I placed solar charger under sunlight for 5,5 hours. It is December, so the sun isn't as powerful as it is in the summer. From 5,5 hours I was able to get 510 mAh  of power. That means it would charge iPhone 5S around 25%.
• Charging time from 0 -100% via 2.4 A external power source was around 7.5 hours.   
• Battery efficiency: From one full charge, I was able to charge my ipad mini retina from 38 to 100%, Samsung Galaxy Note 4 from 0-100%. Battery efficiency with first full charge was 61%. Here is important to mention, that solar charger automatically shut off, although there is still some battery juice, in order to protect its battery from deep discharge.
•  I have no problems charging two tablets at the same time (ipad mini retina and nexus 7).
• Overheating: There were no overheating problems, even when charging two devices simultaneously.

     Compatibility: I have no problem charging: nexus 7, nexus 10, ipad mini retina,  Samsung Galaxy Note 4, bluetooth speaker, sony headset and Garmin GPS watch.

Conclusion: Very satisfied with the product and would recommend it to anyone who is looking for dust and shock proof, water resistant powerbank. But if you want to use it just as solar charger I don't recommend it, because solar panel will charge powerbank slowly.  You have to look at this solar charging as an extra feature, which provides you with some battery juice for those emergency situations. For people who want to charge their devices via sunlight only, I recommend looking for  higher efficiency solar panels (10W or more). Also I would like to see, that micro usb would be built in powerbank as an extra feature.

Review: EasyAcc 15000 mAh Powerbank

This is my review of EasyAcc® 15000 mAh Powerbank. In this review I will provide you with the things that matters most when we are talking about gadgets  - consumer experience.

In the box you get: powerbank, 2 USB to micro USB cables and user manual (read it first!).

Powerbank is quality build and the surface is covered with black rubbery - smooth plastic (similar to Nexus 10 rear side).It's fingerprint friendly (no fingerprints left on the device). On the front side of powerbank, there are 4 USB output ports for charging your devices. On the edge of the smooth plastic surface are four indicators for battery level. Each indicator represents 25 % of power capacity. Using powerbank is very easy, just connect device you want to charge and it will start charging automatically. If for some reason doesn't start to charge, just press the power button. During charging, indicators show you how much battery power is left in portable charger (4 indicators for 75 - 100%, 3 indicators for 50-75 %, 2 for 25-50 % and 1 indicator for 0 -25 % of battery level).

Firstly I fully charged powerbank and then take it to the first test. In this test I evaluated the efficiency ratio of the powerbank. In the first discharging cycle I charged separately : iPhone 5S from 20-100 %, Nexus 10 from 15-100% (airplane mode) and iPad mini Retina from70 - 100% and first generation ipad mini from 50 - 72 %. Both ipads were on airplane mode. After that powerbank ran out of power.

Device battery size:

iPhone 5s: 1570 mAh

Nexus 10: 9000 mAh

ipad mini retina: 6471 mAh

first generation ipad mini: 4490 mAh

80 % of iPhone 5s battery represents 1256 mAh, 85 % of Nexus 10 battery represents 7650 mAh,30 % of ipad mini retina battery represents 1941 mAh and 22 % of first generation ipad mini battery represents 988 mAh. Combining all mAh together, we get 11 835 mAh.

Efficiency ratio for powerbank is 78,9 %. This efficiency ratio is very good, especially if we know that this was only the first fully discharging cycle. Battery will probably be even better after few discharging cycles. I have no complaints over efficiency ratio, on contraryI think it's great.

Even if you aren't charging devices, you know when powerbank is empty. Just press the power button and 1 indicator will start to blink. This means that battery level is below 5% and you can't use it for charging.

Charging time for EasyAcc Powerbank from empty to 100 % was 9.5 hours, using EasyAcc Desktop Charger with 2.4 A output.

In first test I charged devices separately, one by one. There were no overheating problems, actually there wasn't any noticable change in temperature (like it is,when powerbank is off). With the next test, my intention was to evaluate, if there are any overheating problems, when you are charging four devices at the same time. For this test I charged three tablets and a smartphone. It was the same story again.When I was charging four devices at the same time, there wasn't any change in temperature. Powerbank charged all four devices with no problem whatsoever. During test I also noticed that charging speed decreases when we are charging four devices simultaneously. iPhone 5s needed 2h and 10 minutes (30-100%). When I charged just iPhone 5S it took 1h and 40 minutes. For me it's quiet understandable that powerbank will charge with decrease in speed, because it has a lot of capacity to charge from four USB outputs simultaneously.

Conclusion: Overall powerbank is a great device.I recommend this powerbank to anyone who are going on camping for a weekend etc. and don't have access to wall socket. This powerbank will have you covered. I am also very satisfied with effieciency ratio of the device (almost 80% with the first cycle). Many times we buy some powerbanks with huge capacity, but when you charge the devices you get only half of that supposed capacity power. That's not the case with this charger.If you want to stop charging devices for a moment just press power button. When you want to continue charging, press power button again. Would like to see some included pouch for carrying the device.

Review: RAVPower Luster Mini 3000 mAh Portable Charger

For the past few weeks I've been using another portable charger from RAVPower. In the opposite of the previous 15000 mAh portable charger, this is the review of lipstick-sized portable charger.

What you get in the box:
- power bank
- USB to micro USB cable
- manual
- warranty card
- a clip.

Charger is cylinder shaped and covered in aluminium. Device is quality build and it looks very premium. Charger has one input USB port (5V), output micro USB port (5V) and button for a flashlight. Yes, it has flashlight built in. Flashlight has 3 different modes: high, low light and strobe. I used flashlight multiple times for connecting cables to the back of a TV and  a computer.

I was able to fully charge my iPhone 5S. I also charged Samsung Galaxy S4 from 12 - 93 % before battery ran out of power. Efficiency of the powerbank is approximately 70 % Would like to have some battery indicator on the power bank.
Charging powerbank from 0% to 100 % with 5V wall adapter took approximately 3.5 hours. Powerbank is fully charged when blue light appears on the side of the battery charger.

Conclusion: Very affordable (I got it for 8,99 pounds), nice looking device, which give you enough power for situations when you don't have access to wall charger. Register your device on ravpower.com to gain 18 months hassle - free warranty.

Review: RAVPower 3rd Gen Deluxe 15000mAh External Battery Pack

Here is my review of RAVPower 3rd Gen Deluxe 15000mAh external battery pack:

I have received  external battery pack in nice eco - friendly package.

In the box you get:

- battery charger (black or white color)

- 2 USB to micro USB cables

- 2 connectors (mini usb, 30pin)

- travel pouch

- manual
- warranty card

My first impressions were : high quality – compact design, bright led lights indicating battery percentage, matte design, no fingerprints on unit and pretty small for 15000 mAh of power you get. I like the thing, that battery pack has dual usb ports for charging two devices at the same time.  And there is also fully functioning flashlight, which you can turn it on by pressing  button for the 1-2 seconds.  I am also very pleased with all the accessories (usb cables, connectors, pouch) you get in the box.

Out of the box ravpower bank had 3 led lights on (50-75% of battery). I decided to fully charge it first. There are 4 led lights and each one represents 25 percentage of power left in the unit.  I plugged it in, using included micro usb cable and my ipad usb-wall adapter and charged it to 100%.

With first full charged battery pack i charged my ipad mini with retina display, from 0-100 % in airplane mode, my iPhone 5s, from 35-100% and Nexus 10 (airplane mode)from 46-77 % . After that battery pack ran out of power.  I was pretty impressed with its capacity,with awareness that battery pack needs some cycles before it will reach optimal capacaity. Battery pack didn't feel warm for a second. This is great!

Charging ipad mini retina and iphone 5s from battery pack took about the same time as charging from wall charger. But charging nexus 10 with battery pack was about 2x faster than charging from wall charger. 

Charging the battery pack from 0-100 percentage was about 10 hours (with 10W ipad wall charger). It is a lot, but don't forget you get a lot of power in that small-sized unit. When device was charging I noticed one useful feature. When unit is charged over 25 %, one led light stop blinking, the other three led lights continue to blink. The same is when unit is over 50 % and 75% charged (only 2 led lights blinking, only 1 led light blinking, respectively). This feature tells you approximately how much battery is already charged or  how much battery have yet to be charged. When battery pack is fully charged, led lights automatically switch off. Battery pack doesn't overheat during charging, I mean it's not even warm.

After that, i tested charging two tablets at the same time. It works flawlessly as mentioned in the product description.

With battery pack I also charged the following devices: bluetooth speaker RAPOO, Nexus 7 (2012), Sony DR-btn200 wireless headphones,  Garmin GPS watch, ipod shuffle and Samsung Galaxy S4.  Battery pack charged every device I tested.

Conclusion: I am very satisfied with the product and would recommend it to everyone who is looking for a lot of power in small unit size and don't want to spend a fortune on battery pack.  After you buy any of Ravpower products, I recommend to register a product to gain 18 months of warranty protection. 

Link to the product:  http://tinyurl.com/myx4v8o