[One (M7) Accessories] 901-Memphis:
I originally posted this on another forum, but i thought i would post it here too. I have had great success with this companies products for all of my HTC Phones. I have used their products in both my Tmobile G2 and HTC Evo 3d and now since they don't offer an internal battery for the HTC One i had to try the case.

This is my review of the Mugen Power 3,000 mAh battery case. The model number is CC-HTCONESL. This case is the smaller one in their lineup at 3,000 mAh they also have 5,000 mAh case and each version comes in either white or black.

I have been using this case myself since Nov 5th now and i have been extensively putting it through performance tests making sure it has repeatable and reliable performance. So far it has been great, but more on the performance details later.

Here are some pictures of the case itself. You can see the writing on the inside of the case which shows the input and output amperage of the case. It will take longer to charge on a power source of less than 1 amp of output, but works fine if that is all you have.

Here you can see the packaging card and the back of the case with the 4 blue led indicators as well as the button to check the state of charge. The case has perfect cut outs for the camera and flash, as well as one for the upper microphone. Call quality appears normal with the case in use.

Here is the other side of the packaging card with the information on it.

The case simply charges with the same charger you use to charge your HTC smartphone with a micro usb port. You can even leave the case plugged into your phone and charge the case and phone with 1 charger. The case will first charge your phone fully, then charge the case. If you have two chargers, you can simultaneously charge the case and phone if your are short on time.

The case features features 4 blue LED lights for checking the state of charge of the build in Li-Polymer battery pack. It has a red led light near the micro usb port indicating the case is charging and the light will turn green when the case is full.

The case is very simple, you lay your phone into the case and gently press it into place. The phone is charged through a hidden micro usb port that lines up with the phone. The wire and micro usb tip will tuck back into the shell of the case with only the end sticking out for easy retrieval. The wire extends approximately 1 inch from the case. Bonus, you could use this case to charge any micro usb device in an emergency!

You can see a picture of the side of the case with the phone installed. The HTC One is very slim on its own so most all of the extra thickness comes from the case itself, which is not too bad. It still slides into my pocket easier and now is easier to hold because it has more weight to it. I found myself always feeling like i was going to drop the phone without a case due to the light weight and skinny form factor.

I don't have any calipers handy for a precise measurement, but i noticed the case was just a little slimmer than a US nickel. A nickel is 0.835 inches in diameter so i would estimate the total thickness of the case with the phone install at about 0.8 inches.

Here is the sim card side of the phone with the nickel.

Here is a shot of the side of the phone with the case installed. After i looked at the picture i just took, i noticed the phone was not pushed all the way into the case but it still holds firmly even if not pressed fully. I have attempted to hold the case and shake it as hard as i could and the phone will not dislodge, but dropping the phone could certainly cause that.

Continued on next post, due to 10 image limit.

Here is the sim card side of the same setup. Sim card is fully accessible with case installed.

Top of the phone with case. Headphone jack is fully accessible with case installed.

Bottom charging port is fully accessible and bottom microphone is fully open too.

PERFORMANCE!!

Okay now my favorite part the performance side of the case. This was by far the biggest reason i got the case. You can say what you want about the looks of the case, or how it leaves the front of the phone unprotected, but performance is what its all about.

I tested the case many different ways but to eliminate some variables the way i typically charged the case was to put the phone into air plane mode after reaching near 0% and let it do its thing. I have the Battery Bot Pro app installed on my phone which is very handy.

The first shot you will see is a screenshot from my device after charging with the case for just under an hour (57 minutes) The case is able to charge the device up to 40% in this short time. You can see the phone thinks its getting an "AC" charge even though this is a DC source, this is a good indication that the device is delivering the indicted 1 amp of charge rate.

I left the phone alone awhile longer and came back to it at 68% after 1 hour and 42 minutes of charging.

The last shot is of the case fully depleted from a full charge. It was able to charge my device from 2% all the way up to 87% in only 2.4 hours! The voltage on the battery ended over 4.20v, while a full charge on this device is closer to 4.35v.

I am very happy with the performance of the case. I have been using it daily since Nov 5th and It was able to repeatedly charge my phone from near 0% all the way up to 85-88% over and over again. Even though this is a 3,000 mAh capacity battery in the case you are going to lose a lot through the electrical efficiency since its charging the same type of battery and has to step up to 5 volts. This type of efficiency is typical of battery cases and nothing abnormal here.

A more typical usage of the case would probably be to plug it before it was close to dead and unplug the port when the battery is depleted or when you have gotten enough charge to make it through the day so you can leave your port protected inside the case .

PROS: Power on the go, protection to the back and side of the phone, Uses the same charger as your phone, battery indication for state of charge, fast charge rate, leaves all the ports and opening on the phone available, makes phone easier to hold, ability to charge other micro usb devices in emergency

CONS: Leaves the front face of the phone open to damage if dropped, micro usb port is vulnerable when plugged into the phone and on the go, possibility of damage if rough

Summary: A case for true power users, who love the HTC One but can't make it through the day without needing a little extra juice! Casual users would be more suited to using a full protection case that offers front bezel protection.

The case is available directly from Mugen for 89.50 with free worldwide shipping and tracking included in that price.

Links to product for purchase.

http://mugenpoweronline.com/zaspx/p...eNo=&sortby=sortid&orderby=desc&keyword=N9005

Face Book Page: https://www.facebook.com/power.mugen.5