Product review: Vinsic 20000mAh Smart Dual USB Port Slim Power Bank, External Battery Charger

When I shop for external batteries I always seek out those that have smart charging chip. This means it can charger any device at its optimal charge - Apple devices require 2A, most Android devices require 1A (note that the new Nexus phones do rapid charging at 2.4A when the phone battery is low).



To test if in fact this claim is supported I used a current meter and a resistor with 2A and 1A settings. As advertised both ports were able to deliver the rate advertised by the resister. 0.96A/5.13V delivered with 1A resistor, and 1.85A/5.06V delivered on 2A resistor (it is normal to see some loss due to inefficiencies such as heat loss). Attached are images showing the tests.



The battery has a large capacity (20,000mAh) and is fairly large: 6 3/8" x 3 1/4" x 1". It weighs 1 pound and 0.3 oz. It has two ports. Another feature I like is the digital display showing how much capacity the battery has remaining. The display comes on automatically when I charge, or I can see it at any time by pressing an icon next the display. This is external battery does not allow charge through (i.e. it cannot charge while being charged). I have been using this battery for just over 2 weeks as I write this review. It holds the charge quite well (very little loss when disconnected) and the rating to appears to be accurate.



I received this power bank for evaluation and review. It is a good one!



YOu can find "Vinsic 20000mAh Power Bank" on Amazon by following this link.





AshopZones review ★★★★★

Product review: NewNow 20000mAh Power Bank Portable

This external packs turned out to be larger than I imagined from the stock photos. Its size is 5.75" x 1.75" x 0.75" and it weighs slightly over a pound. The power pack has two ports, both of them are 1A. The external pack as a small built-in flashlight. It generates a very small beam of light and is not very bright.



The external battery performed very well charging with my Android phone. It did not perform at am optimal range for IPad Mini. My current monitor showed that neither of the ports delivers over 1A, which is required for an optimal charge for Apple devices.



To see how well different chargers and external batteries charge my mobile devices I use a Nexus phone and an iPadMini to test each of them. The current drawn from the battery depends on each device using the battery. I always use the same two devices and I do my tests with the devices charged to the same level, running the same applications and using the same cables to keep everything the same. This allows me to do a relative comparison of each battery and identify the ones that do not perform well. Note that these tests are not testing for the maximum current each device can draw on each port as neither of my devices can max out the port.



I also tested to see if the battery supports pass-through charging (i.e. whether the battery can charge mobile devices while it is being charged). This battery does NOT supports charge through charging. It can not charge while being charged.



Samsung Nexus phone:

~~~~~~~~~~~~~~~~~~~

port 1: 1.02A/5.05V (excellent comparing the performance of the same device with other chargers)

port 2: 1.00A/5.04V (excellent comparing the performance of the same device with other chargers)

(for comparison the best charging monitor result for this phone is 1.00A/5V)



iPad Mini tablet:

~~~~~~~~~~~~~~~~~~~

Neither of the ports delivers over 1A, which is required for optimal charge for Apple devices.

port 1: 0.93A / 5.08V (average for 1A port for the same device with other chargers)

port 2: 0.93A / 5.10V (average fpr 1A port for the same device with other chargers)

(for comparison the best charging monitor result for this tablet is 1.70A/5V)



Summary:

' size: 5.75" x 1.75" x 0.75"

' weight: 1 lb 7 oz

' number of ports: 2 - both ports are 1 Amp

' flashlight: yes

' pass through charging: NO (i.e. the battery CANNOT charge while being charged itself)

' cables: 1 charging cable



Since neither of the ports produced more than 1A this battery is best suited for Android devices, MP3 players, portable speakers etc. Just not devices that work best with 2A ports such as Apple devices.



This battery pack is provided by NewNew for testing and review. Getting a review product does not influence what I say, I run tests and report what I see purely based on a performance of the product.



You can find it on Amazon by following this link.





AshopZones review ★★★★☆

Product review: ROMOSS Sense 6 Plus 20000mAh Portable External Power Bank

' size: 6 1/4" x 3 1/8" x 7/8"

' weight: 16.85 oz

' number of ports: 2 ports

' flashlight: no

' cables: 1 charging cable



This external battery performed very well (1.36A/5.01V) on 2A port with my iPad Mini, the second port is 1A and it showed typical performance for this tablet on 1A drawing 0.93A/5.00V (this is below optimal, but normal for 1A port).

My Nexus phone drew only USB rate on 2A port (0.42A/5.00V), and below average on 1A (0.89A/5.01V).



To see how well different chargers and external batteries charge my mobile devices I use a Nexus phone and an iPadMini to test each of them. The current drawn from the battery depends on each device using the battery. The port rated with maximum capacity of 2A does not always deliver 2A, what is actually delivered is controlled by the device based on many factors such running apps, level of charge, and so forth. I always use the same two devices and I do my tests with the devices charged to the same level, running the same applications and using the same cables to keep everything the same. This allows me to do a relative comparison of each battery and identify the ones that do not perform well. Note that these tests are not testing for the maximum current each device can draw on each port as neither of my devices can max out the port.



I check if the cable that came with the battery is a charging cable (i.e. capable of charging at full AC rate or if charges at slower USB rate). This is easy to tell by using a current monitor and I happy to report that this package includes a charging cable that works at AC rate.



The best feature of this battery is the large capacity. Given that it is not a fast charger my main use for this battery is to have it power my my MP3 speaker with external speaker. I use it a lot and normally need to switch the external power pack every day, but using this battery I can go for several days without a swap.



You can find it on Amazon by following this link.





AshopZones review ★★★★☆

Product review: Jackery Titan Premium Travel Charger 18000mAh

' size: 5 7/8" x 3 1/4" x 3/4"

' weight: 15.65 oz

' number of ports: 2 ports

' flashlight: no

' cables: 1 charging cable



This external battery performed pretty well for charging both my Android phone and Apple iPadMini tablet. iPad Mini performed in line with the best external batteries I have tried, and Nexus phone did very well on one port and slightly worse on the second port.



To see how well different chargers and external batteries charge my mobile devices I use a Nexus phone and an iPadMini to test each of them. The current drawn from the battery depends on each device using the battery. The port rated with maximum capacity of 2A does not always deliver 2A, what is actually delivered is controlled by the device based on many factors such running apps, level of charge, and so forth. I always use the same two devices and I do my tests with the devices charged to the same level, running the same applications and using the same cables to keep everything the same. This allows me to do a relative comparison of each battery and identify the ones that do not perform well. Note that these tests are not testing for the maximum current each device can draw on each port as neither of my devices can max out the port.



I check if the cable that came with the battery is a charging cable (i.e. capable of charging at full AC rate or if charges at slower USB rate). This is easy to tell by using a current monitor and I happy to report that this package includes a charging cable that works at AC rate.



Samsung Nexus phone:

~~~~~~~~~~~~~~~~~~~

port 1: 1.00A / 5.05V (excellent comparing the performance of the same device with other chargers)

port 2: 0.84A / 5.01V (below the best, but above USB rate)

(for comparison the best charging monitor result for this phone is 1.00A/5V)



As noted above these tests are not designed to test the maximum capacity of the port, so 2A port not showing 2A is not an indication of a problem



iPad Mini tablet:

~~~~~~~~~~~~~~~~~~~

port 1: 0.83A / 5.00V (typical for 1 A port)

port 2: 1.43A / 5.09V (excellent comparing the performance of the same device with other chargers)

(for comparison the best charging monitor result for this tablet is 1.70A/5V)



The battery has a nice capacity and fast charging rate for both Android and Apple devices



You can find it on Amazon by following this link.





AshopZones review ★★★★★

Product review: Letouch® Bossa 1350mAh Ultra Slim Power Bank

LeTouch 1350 mAh external battery is super slim - the thinnest battery I own and it weights only 1.5 oz. It comes with a short (1") built-in cable and it chargers my phone at a good clip (8% in 10 minutes). I run this the same test on all external batteries with built-on cable (since I cannot use a current monitor on these cables). I run the test with phone battery at the same level running the same apps so I can compare different batteries to each other and it compares well with the other batteries running the same test. Its capacity is only 1350 mAh and some of it wasted towards heat, so it does not have enough capacity to fully charge my phone with extended battery. So for the phone it is just a quick emergency boost when the phone needs it. However it works very well with my MP3 player which is less power hungry and when I have it along on my exercise walks I want a battery that it very small and light and LeTouch works very well.



I am able to fully recharge a totally discharged LeTouch in less than 2 hours. It comes with a short (2.5") charging micro USB cable, but it works with any standard cable too.



The only negative I can say about this battery that it does not have a charge level indicator, so I am not able to tell when I am about to run out of juice.



When you don't need a power house charger and weight/size matters this battery is just the right thing.



You can find it on Amazon by following this link.







AshopZones review ★★★★☆

Product review: Le Touch 3200mAh Ultra Slim External Battery Bank

LeTouch 3250 mAh external battery is super slim and it weights only 3.5 oz. It comes with a short (3.5") built-in cable and it chargers my phone at a good clip (9% in 10 minutes). I run this the same test on all external batteries with built-on cable (since I cannot use a current monitor on these cables). I run the test with phone battery at the same level running the same apps so I can compare different batteries to each other and it compares well with the other batteries running the same test. Its capacity is only 3200 mAh and some of it wasted towards heat, but it is just enough to fully charge my phone with a large battery. It also works very well with my MP3 player. When I have it along on my exercise walks I want a battery that it very small and light and LeTouch works very well.



This battery has a charge level indicator (some slim batteries like Le Touch 1350mAh give up this feature) but to me a charge level indicator is very helpful so I have an idea that the battery is about to run out of juice, so I am glad that Le Touch 3500mAh has it.



When you don't need a power house charger and weight/size matters this battery is just the right thing.



You can find it on Amazon by following this link.







AshopZones review ★★★★★

Product review: YOTOSAN Smart 16-Outlet Home Vertical Power Strip

This outlet tower fits perfectly behind my computer. I don't have a lot of room there and need a lot of outlets - both AC and USB powered - and this tower is perfect in that space. There are 15 AC outlets and 2 USB outlets. The AC outlets are well spaced out. I am able to mount two large chargers next to each (see video), no outlets are blocked! This is a very clever design.



The two feet power cord can be coiled in the base of the tower and I can release only what I need. This reduces the cord jungle I have behind the computer.



I tested each USB port with a current monitor an Android device and an Apple device. Both ports are 1A ports. They charged my Android devices at the optimal rate, and my Apple devices below optimal (since they need more than 1A to perform at the optimal rate). I do my tests with the devices charged to the same level, running the same applications and using the same cables to keep everything the same. This allows me to compare them to each other in a fair way. I use the current monitor to see what current is delivered to each device which tells me how well each external battery is working.



Samsung Nexus phone:

~~~~~~~~~~~~~~~~~~~

1 port: 0.97A/5.03V (excellent)

2 port: 1.01A/5.01V (excellent)

(for comparison the best charging monitor result for this phone is 1.00A/5V)



iPad Mini tablet:

~~~~~~~~~~~~~~~~~~~

1 port: 0.93A/5.02V (average for 1A)

2 port: 0.93A/5.01V (average for 1A)

(for comparison the best charging monitor result for this tablet is 1.70A/5V)



I love the shape of this power strip, it gave me more than enough outlets in the area which barely has any space.



You can find it on Amazon by following this link.







AshopZones review ★★★★★

Product review: Kinps 20000mAh Portable Power Bank

' size: 8.25" x 5.5" x 1.5"

' weight: 1 pound

' number of ports: 3 universal ports

' flashlight: no

' cables: 1 charging cable



This external battery performed very well charging both my Android phone and Apple iPadMini tablet. Each port of this battery is universal, i.e. each of my devices does equally well on each port.



To see how well different chargers and external batteries charge my mobile devices I use a Nexus phone and an iPadMini to test each of them. The current drawn from the battery depends on each device using the battery. The port rated with maximum capacity of 2A does not always deliver 2A, what is actually delivered is controlled by the device based on many factors such running apps, level of charge, and so forth. I always use the same two devices and I do my tests with the devices charged to the same level, running the same applications and using the same cables to keep everything the same. This allows me to do a relative comparison of each battery and identify the ones that do not perform well. Note that these tests are not testing for the maximum current each device can draw on each port as neither of my devices can max out the port.



I check if the cable that came with the battery is a charging cable (i.e. capable of charging at full AC rate or if charges at slower USB rate). This is easy to tell by using a current monitor and I happy to report that this package includes a charging cable that works at AC rate.



Samsung Nexus phone:

~~~~~~~~~~~~~~~~~~~

port 1: 1.02A / 5.10V (excellent comparing the performance of the same device with other chargers)

port 2: 1.02A / 5.09V (excellent comparing the performance of the same device with other chargers)

port 3: 1.02A / 5.10V (excellent comparing the performance of the same device with other chargers)

(for comparison the best charging monitor result for this phone is 1.00A/5V)



As noted above these tests are not designed to test the maximum capacity of the port, so 2A port not showing 2A is not an indication of a problem



iPad Mini tablet:

~~~~~~~~~~~~~~~~~~~

port 1: 1.23A / 5.08V (good comparing the performance of the same device with other chargers)

port 2: 1.15A / 5.09V (good comparing the performance of the same device with other chargers)

port 3: 1.35A / 5.10V (good comparing the performance of the same device with other chargers)

(for comparison the best charging monitor result for this tablet is 1.70A/5V)



The battery has a nice capacity and fast charging rate for oth Android and Apple devices. I use it to power a 4" speaker which is used several hours a day and it runs for many days without needing a recharge.



You can find it on Amazon by following this link.







AshopZones review ★★★★★

Product review: Chafon Cf-UPS008 Portable Backup Power UPS

Charon UPS documentation claims a very impressive performance. To verify the numbers I started by testing Chafon performance with my laptop to see if it comes close to the documented performance.



Chafron documentation states that they expect a 13" laptop to run for 6 hours. I took out the battery from my laptop, set the power options to never go into sleep mode and not to shut down the screen and measured how long it can run after I charged Charon UPS to its full capacity. The laptop ran from 5:50 pm to 12:25 am, for a total of 6 hours 35 minutes. For the last 5 minutes the battery level was shown as 0% and blinking, so I had a warning that it was about to run out of juice. This is the best case power usage scenario as I was not running any programs on the laptop other than the idle mode of the operating system. If the computer was doing some more intense work the power consumption would be higher and the battery would last less time. Never the less my test confirmed the numbers stated in the documentation and this backup battery has an impressive performance.



Once I exhausted the battery in my laptop experiment, I timed how long it took to fully recharge the Chafon battery.



8:20am start - 3% full

9:30am - 56% full

12:30pm - 88% full

1:00pm - 100% full



It took 3 hour and 40 minutes to fully recharge the battery.



I like how Chafon clearly identifies how long the battery will last. They state that it produces 288 WH, which means it can produce 288 watts per hour. To find out how long any devices will run on this battery you have to divide 288 watts by the amount of power a device draws. A watt is current multiplied by voltage. For example, if I measure my USB fan with a current monitor I get 0.40A and 5.05V which is 2.02 watts. This means this fan should run for approximately 144 hours (6 days) before this battery is exhausted.



The unique feature of Chafon UPS its portability. The Chafon box comes in a case with a handle, it weights 7 pounds and 1.2 oz, and its size is 11"L x 4.25"WS x 5.25"H.



Chafon has both AC and USB port. I found many uses for this large portable battery from using it as a back up when the power goes out at home to re-charging my Ghost drone (its battery requires an AC plug so my other battery chargers could not do it).



It lives up to the numbers they promise.



You can find it on Amazon by following this link.







AshopZones review ★★★★★

Product review: Kmashi MP828 20000mAh Lightning Fast Charging Dual USB External Battery Backup Pack

This is a review for Kmashi MP828 20000mAh Lightning Fast Charging Dual USB 2Amp Input External Battery Backup Pack Power Bank. This seller has a history of re-using the same ASIN number for multiple products, which means the reviews for the old and the new external packs are mixed together and the buyer has to figure out on their own if the review is relevant or not. I got this battery on July 5, so at least as of July 5th this listing was for the 20000 mAh external pack and not the previous product.



♦ size: 6.25" x 2.25" x 1.25"

♦ weight: 14/6 oz

♦ number of ports: 2

♦ flashlight: no

♦ pass through charging: no (i.e. the battery can charge while being charged itself)

♦ cables: 1 charging cable and 1 AC cable



The external battery performed very well charging both my Android and Apple devices. The test results showed it to be at the top of ratings for both devices on both ports.



To see how well different chargers and external batteries charge my mobile devices I use a Nexus phone and an iPadMini to test each of them. The current drawn from the battery depends on each device using the battery. The port rated with maximum capacity of 2A does not always deliver 2A, what is actually delivered is controlled by the device based on many factors such running apps, level of charge, and so forth. I always use the same two devices and I do my tests with the devices charged to the same level, running the same applications and using the same cables to keep everything the same. This allows me to do a relative comparison of each battery and identify the ones that do not perform well. Note that these tests are not testing for the maximum current each device can draw on each port as neither of my devices can max out the port.



I also tested to see if the battery supports pass-through charging (i.e. whether the battery can charge mobile devices while it is being charged). This battery does NOT supports charge through charging. It can not charge while being charged.



Finally, I check if the cable that came with the battery is a charging cable (i.e. capable of charging at full AC rate) or a data cable (charging the battery at USB rate). This is easy to tell using the current monitor, and this package includes a charging cable.



Samsung Nexus phone:

~~~~~~~~~~~~~~~~~~~

port 1: 1.02A/5.06V (excellent comparing the performance of the same device with other chargers)

port 2: 1.00A/5.06V (excellent comparing the performance of the same device with other chargers)

(for comparison the best charging monitor result for this phone is 1.00A/5V)



As noted above these tests are not designed to test the maximum capacity of the port, so 2A port not showing 2A is not an indication of a problem



iPad Mini tablet:

~~~~~~~~~~~~~~~~~~~

port 1: 1.31A / 5.08V (average for 1A port for the same device with other chargers)

port 2: 1.40A / 5.10V (good comparing the performance of the same device with other chargers)

(for comparison the best charging monitor result for this tablet is 1.70A/5V)



The battery has a nice capacity and fast charging rate both both Android and Apple devices. I have been using this battery pack for the past two weeks and have been pleased with it. During a 3 day heat wave I used it to power a USB powered fan and got three days on one charge.



You can find it on Amazon by following this link.





AshopZones review ★★★★★

Product review: AVANTEK 20000mAh External Battery Pack Power Bank

♦ size: 6.25" x 3.125" x 0.75"

♦ weight: 1 pound 1 oz

♦ number of ports: 3

♦ flashlight: yes

♦ cables: 1 charging cable



The external battery performed very well charging both my Android phone and Apple iPadMini tablet.



To see how well different chargers and external batteries charge my mobile devices I use a Nexus phone and an iPadMini to test each of them. The current drawn from the battery depends on each device using the battery. The port rated with maximum capacity of 2A does not always deliver 2A, what is actually delivered is controlled by the device based on many factors such running apps, level of charge, and so forth. I always use the same two devices and I do my tests with the devices charged to the same level, running the same applications and using the same cables to keep everything the same. This allows me to do a relative comparison of each battery and identify the ones that do not perform well. Note that these tests are not testing for the maximum current each device can draw on each port as neither of my devices can max out the port.



I check if the cable that came with the battery is a charging cable (i.e. capable of charging at full AC rate) or a data cable (charging the battery at USB rate). This is easy to tell using the current monitor, and this package includes a charging cable.



Samsung Nexus phone:

~~~~~~~~~~~~~~~~~~~

port 1: 0.99A/5.01V (excellent comparing the performance of the same device with other chargers)

port 2: 0.99A/5.02V (excellent comparing the performance of the same device with other chargers)

port 3: 1.01/5.01 V (excellent comparing the performance of the same device with other chargers)

(for comparison the best charging monitor result for this phone is 1.00A/5V)



As noted above these tests are not designed to test the maximum capacity of the port, so 2A port not showing 2A is not an indication of a problem



iPad Mini tablet:

~~~~~~~~~~~~~~~~~~~

port 1: 1.17A / 5.05V (ok comparing the performance of the same device with other chargers)

port 2: 1.13A / 5.04V (ok comparing the performance of the same device with other chargers)

port 3: 1.05A / 5.04V (ok comparing the performance of the same device with other chargers)

(for comparison the best charging monitor result for this tablet is 1.70A/5V)



The battery has a nice capacity and fast charging rate both both Android and Apple devices. I also use it to run a usb-powered fan and can get several days out of it on one charge.



You can find it on Amazon by following this link.







AshopZones review ★★★★★

Product review: Gembonics Portable Charger 6000mAh - External Battery Power Bank

This is a very compact external battery for its size. It has one port and based on my current monitor readings it is a 1 Amp port. My Android phone draw a current somewhat below average, and iPad Mini draws a current typical for 1 Amp port (which is below optimal for Apple devices that need a 2A port to charge at the optimal rate). For those who are interested attached images captures the results of each test.



The size of the battery is 3 7/8" x 1 7/8" x 7/8" and it weighs 4.9 oz.



My favorite use for it is with my MP3 player that has a built-in battery which no longer holds a charge well. I keep always plugged into the external pack, this way I never need to worry about the battery running out.



This battery really has the best size to capacity ration among all external packs I own.



You can find it on Amazon by following this link.





AshopZones review ★★★★☆