Choice of the charger：Greenspot or the standard one

Hi, whoever is reading this

Here‘s the prob：

I bought my touch gen4 with an so-called authentic tiny charger ’greenspot‘. However, when i charge my touch with it and with earplug plugged in, i always hear some sizzlings, noise more precisely, from the earplug.

the specifics of the charger :

input:100-240v~50/60HZ 0.15A

output：dc 5v 1A

What's more,there's no such noise when I try charging my touch with another charger designed for sony products featuring specs:

input:AC 100-240v 50-60hz, 0.15A

output: DC 5v 0.8A

Question is :

1. would the greenspot charger damage the touch's battery with more often uses?

2. would there be any potential danger if i keep using the sony charger? Otherwise I'll buy a stardard charger for apple products.