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Mediasonic ProBox Black 5200 mAh Universal Power Bank 5200mAh Battery Capacity - Sanyo Battery Cell HE-1-52U1

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Learn more about the Mediasonic HE-1-52U1


Portable Battery


Compatible Phone Manufacturer


5200 mAh
Sanyo Battery Cell 5200mAh (Made in Japan)

Battery Protection IC for safety protection

Safety Protection: Cell overcharge, Cell over-discharge, Cell over-curent, USB port short-circuit protection, USB port output current protection, Input voltage protection.

Power Button
- Press for Power On
- Press and Hold for 1 second for Power Off

Power Specification:
- Safety Certification: CE / FCC
- Input Voltage: DC 5V
- Input Current: 1A Max
- Output Voltage: DC 5V
- Output Current: 1.2A Max
- Output Watt: 6W

Package content:
- Power Bank
- Micro USB Cable
- Quick Installation Guide


Charge most of mobile devices including smart phones, tablets, and difital cameras with standard USb 5V power input

Up to 1.2A current output supports fast charging for most smart phones and mobile devices

Triple safety protection design for safety and reliable usage

5200mAh battery capacity

Sanyo lithium ion battery inside Made in Japan

LED light indicator for battery capacity

Power On / Off button

Designed and Manufactured in Taiwan


4.17" x 1.89" x 0.94"

Quick Info


  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year

Customer Reviews of the Mediasonic HE-1-52U1

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  • Joe P.
  • 8/2/2014 7:49:39 PM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsgreat portable charger

Pros: portable and can use anywhere
small enough to stick in a pocket
can charge for a long while at least 6-8hours provided you charge it fully.
Great bargain if you can get it on sale.

Cons: none

Did you find this review helpful? Yes No

  • John A.
  • 7/19/2014 4:20:39 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsExceeded Expectations

Pros: Appears to be very robust construction. Well fitted assembly. No mismatched edges snagging on pockets or bags. Narrow design lets it fit in a cup-holder in a car...don't have to worry about it flopping around while in use.

Rounded corners mean it doesn't snag inside pockets or carry bags, and won't poke holes in the material...unlike sharp-cornered units.

Appears to execute a Power-On-Self-Test, which is not specified but good to have. Many "power banks" do not.

Power button is recessed. Good design choice..
USBout port and USBin port also recessed. Will help avoid damage and accidental shorts. Further reducing chance of shorts, the unit turns itself off after about 8 seconds if nothing is connected to the cable.

Has charged every tablet and phone connected to it (some needed a different cable).

Aesthetics: Looks nice. Blue LEDs not overwhelming.

Cons: None so far

Other Thoughts: Well worth the on-sale price I paid. Will likely buy as gifts if no problems in next few months.

Personally, I believe in redundancy when it comes to portable electronics, so I plan to use 2 of these instead of 1 larger capacity "power bank". Bonus is that 2 of these (on sale) cost less than a single equivalent total capacity unit (also on sale). Also, having 2 units provides flexibility to recharge one while the other is carried around, and if one fails I still have another portable bank immediately available.

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  • Joel H.
  • 7/8/2014 10:25:49 AM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsGood Product

Pros: Lightweight
Holds about 4 charges for the iPhone 5S
Charges fast

Cons: Expensive if not on sale

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  • jim f.
  • 6/28/2014 9:26:17 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

3 out of 5 eggsNot compatible with all phones and devices

Pros: The big battery in a smaller package is nice. It does have a little more weight than others but the protection circuitry should be worth the extra weight.

Cons: I received one and it was bad out of the box. The second one I received works well, just not compatible with the Galaxy s5. I have used several portable chargers and they work well with my phone, this one is a no go with the s5

1 out of 1 people found this review helpful. Did you? Yes No

  • randall e.
  • 6/27/2014 7:38:58 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggs

Pros: well this worked after i charged it but havent used in a while so better check it out and see if it still works

Cons: none so far

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  • jim f.
  • 6/27/2014 4:36:36 PM
  • Tech Level: High
  • Ownership: less than 1 day
  • Verified Owner

1 out of 5 eggsdid not work after initial charge

Pros: none seeing as it doesn't work

Cons: does not charge anything for more than 5 seconds before shutting down

Other Thoughts: I usually trust offers from newegg, but this is just awful. I charged it for about 5 hours and initially tried to use it only to find it does not remain on

1 out of 1 people found this review helpful. Did you? Yes No

  • Charles B.
  • 6/9/2014 6:22:19 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsWorks well and fast

Pros: I plugged this into my phone, which was at 55% charge. The phone was 100% charged when I checked it 90 minutes later. This is faster than charging the phone with the included charger. The Power Bank is still showing fully charged so it's now charging a camera battery. This is the power bank I'm going to carry with me.

Cons: None

Other Thoughts: This is my second power bank. The other one was from another manufacturer and was very disappointing. This Mediasonic Power Bank does a good job and I'm completely satisfied with it.

1 out of 1 people found this review helpful. Did you? Yes No

  • Anonymous
  • 6/1/2014 1:03:53 PM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsGreat Product

Pros: Item arrived in a timely fashion and operates as described. Would recommend this product to others.

Cons: None so far.

Did you find this review helpful? Yes No

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