Lightbulb [Charger] Advice needed

Hi

My phone needs almost a recharge everyday, but now on work I can recharge for free I think

Don't want to use the stock one, can I use a stock USB charger?
It needs to be build well, especially the cable and connector, because I will put it in my bag and not really care it very well
Also one thing: I don't want an extra usb cable, just a wall connector with cable and micro-usb port.
BTW: I live in Belgium

Suggestions please, and I dont want to pay a lot for it

EDIT: what about this: click!
Should it work on WFS? For this price, I would like to buy it (use google translate to understand)

Past
Present

HTC Wildfire S (marvel)
Xiaomi MI2 (aries)

SlimSandwich
WIUI + CM