Is it save to use a 3rd party battery pack with my Galaxy S6?

[amadison69]

I am going out of town this week, and I received an external battery from my friend. It is sort of a promotional item as it has his work place's logo on it and its own mid quality micro usb to usb.

The specs on the battery are:
Input: DC 5V-500mA
Output: 5V-1000mA
Capacity: 2200mAh

I realize this battery will not do a significant amount but any amount counts with the battery on this device, I just want to make sure the battery pack will not harm my device's battery in any way.

Thank you!

 

[belodion]

The specs are okay, but if the battery is of low quality, or faulty, it might do damage.

 

[amadison69]

Thanks for the quick reply!
Would it do damage with continued use or could it possibly damage it with just a few uses? I'm not familiar with how phone batteries work but I am always scared to use 3rd party chargers and usb's.

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