Will power bank hurt battery life or not?

recently i noticed there are a few power bank released and claimed that they can fully charge phones or recharge in minutes. But will that hurt your phone's battery life? They claim they're not, but i'm not sure about this,,,,,

http://www.simpizitron.com/

http://www.amazon.com/dp/B01BF3OZ9W/ref=sxr_pa_click_within_right_aps_sr_pg1_1?psc=1

I randomly picked two different charger ,..but will they really charger that quick with no harm to the battery????

Will anyone answer my question? Thank you ..

 

 

Hi,

First of all, in my share of experience with power banks, I also experience those fast charging types that are sold in the market. Although it can charge my battery faster, it also drains fast. My guess is that since the bank is supplying high voltage although it says it has been fully charged, its the contrary. Every battery has its own capacity and ofcourse it entails losses everytime you charge them. That is what I noticed also, the battery can't last longer anymore.

When the output voltage matches, there cannot be an issue with the battery life of your mobile device.  Although you don't have to leave them plugged in beyond the charging period, when you do, the high-quality power banks do not overcharge your mobile device or impact the performance of the battery.