Certified by Apple - Lifetime Warranty - Dual USB Ports 3.1A Portable USB Car Charger for iPhone 5 5S 5C 4 4S,iPad 4 3 2,iPad mini,iPad air (Lightning Cable/Adapter Not Included) Battery Power Supply for All Apple Device - Premium MFI Quality (Black+Red)..
Buy Certified by Apple - Lifetime Warranty - Dual USB Ports 3.1A Portable USB Car Charger for iPhone 5 5S 5C 4 4S,iPad 4 3 2,iPad mini,iPad air (Lightning Cable/Adapter Not Included) Battery Power Supply for All Apple Device - Premium MFI Quality (Black+Red) By Roker(TM)
Most helpful customer reviews
13 of 14 people found the following review helpful.
By Brett R
This product is compact, smartly designed, and works great. It's a huge step up from other cheaper usb car chargers that i've bought from amazon in the past. It stays securely in my 12v car socket and charges my iphone quickly. Solid product and i would highly recommend it to anyone looking for a usb charger.
11 of 12 people found the following review helpful.
By Ali Julia
Watch Video Here: http://www.amazon.com/review/RGOY3ULB7RABT Rocker Dual USB Car charger is very compact and provides up to 3.1Amps the combined power between two USB slots, the slots are labelled 1A and 2.1A. The charger performed very well, it is very speedy. I tested this charger with a data cable and a charging cable. The charging cable made a big difference as you can see in the tables below.
The charger is 2.75" long and 1.125" wide (USB ports end). It weighs 0.8 oz. It fit the car port very firmly and did not get dislodged even on rough roads.
➨ How I tested this car charger:
======================
I have been testing various chargers for a long time, and people often ask me why results differ so much from charger to charger and often port to port. The results are different because they are affected by a number of factors. To help with a numerical explanation of the differences I began using a USB current monitor which shows the voltage and the current flowing between the battery and the device.
The amount of energy transferred from the charger to the device is calculated by multiplying voltage and current. Most of the chargers are 5V devices and most devices show the voltage very close to 5V. The interesting number is the current as it varies from unit to unit and from port to port.
The current varies based on what the device requires and what battery provides. This communication happens using different protocols depending on OS. Newer Android OS versions have adapted their protocols to get better performance from ports aimed at Apple devices. An addition variable that effects performance is whether a data cable or charging cable is used to charge the device. The charging cables short the two data connections together (rendering them useless for data transfer), but this fools devices to see the cable as an AC power connection, and thus accept the higher current of the charging source.
The 10 minutes test consists of charging each mobile device on each port of the battery pack for 10 minutes and measure how much each unit was charge in that 10 minute period. Since the charging speed is non-linear I start charging each device from approximately the same charge level. I use 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.
➨ Test Results:
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✔ Samsung Nexus Phone
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Port 1: 10 minute test: ~~~~~~ AC rate ~~~ 7% in 10 minutes (charging cable)
Port 1: current monitor: ~~~~~ 0.88A, 5.05V (4.44W) (charging cable)
Port 2: 10 minute test: ~~~~~~ AC rate ~~~ 6% in 10 minutes (charging cable)
Port 2: current monitor: ~~~~~ 0.86A, 5.17V (4.44W) (charging cable)
Port 1: 10 minute test: ~~~~~~ USB rate ~~~ 1% in 10 minutes (data cable)
Port 1: current monitor: ~~~~~ 0.46A, 5.10V (2.34W) (data cable)
Port 2: 10 minute test: ~~~~~~ USB rate ~~~ 3% in 10 minutes (data cable)
Port 2: current monitor: ~~~~~ 0.43A, 5.08V (2.18.2W) (data cable)
I received this charger from the manufacturer for an honest review be it positive or negative. I like its compact size and fast charging.
Ali Julia review
8 of 9 people found the following review helpful.
By Uggie K
This adaptor fits nice and snug into the lighter compartment of the call.
A few items to be aware of before buying:
1. When inserting the USB cables into the adaptors ports, they are so snug that you have to yank on them a bit to pull them out.
2. Sometimes when pulling out the adaptor ends up popping our of the lighter port
3. The charging times due vary when you have two devices plug into this adaptor.
With that said, so far so good.
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