I was planning to buy a DC Charger which stores 2600mAh of charge.since it provides dc charge,i was wondering if it harms the health of mobile.i plan to charge samsung device with it.

Here is the link to charger:

Will occassional charging from such device affect phone's health?

Will regular charging affect phone's health?
or none of the above will affect my phone's health at all.
Thanks in advance