Cheap Battery Charger

I will not buy cheap sub-standard china-made electronics anymore. I just bought a battery charger for 195pesos since the other better quality battery chargers are sold at 500pesos-800pesos so I opted for the cheap one. When the clerk tested it, it seems working since all lights are lighted to show that the charger is working. When I got home, I put my rechargeable batteries in the charger and have it charge for four hours. After which I got the batteries and put in our camera and…the batteries are still low and only lasted for 2 pictures taken with flash.