BatteryMonster.com review: send a defective battery and didn't refund the whole amount

I ordered a laptop battery from Battery Monster and I received a defective battery. The battery was not recognized by my laptop. My laptop battery light was flashing yellow and I got a message saying no battery was detected. I requested a refund and paid to ship the defective battery back to them. The battery cost was 50.95 and when they sent me a refund it was only for 35.31. I will never do business with them again and I will not recommend them to anyone.