I’ve had the card since early November of 2014, and from what i can tell it is a genuine card. Everything was sweet until about a week ago when i noticed a MASSIVE battery drain on my LG G3. I could literally watch the battery draining by about 1% per min doing nothing. Traced it to the SD card so i removed it, reformatted it and tried it again. Was fine for about 5 days then out of nowhere, started draining again. I remove the card and the problem stopped.
How can i find out if the card is faulty, and without a receipt what are my chances of getting a replacement if it is found to be faulty?