faulty charger

[lak100]

hi yesterday i made some test with ampere from play store im using original samung charger (2A) for second charger i had the lg charger that came with phone. with samsung charger and lg cable i had 950ma result with a belkin cable i had 750ma. i rested the lg with belking and i had only 20ma is my charger faulty? im thinking to buy belkin mixit charger 2.4a