it is better to put some € more in a more serious charger

I bought 2. From the beginning, the plastic cover next to a phone card opened revealing the metal son. It took the tape sheets listed sector of 2 chargers float somewhat in outlets result the load is intermittent. I do not like the battery of my nokia 710 which holds that 1/2 day when loaded with these chargers (2x less than when it is loaded with the original charger).
In short, it's not cheap but it's not worth much either