Hey guys. I found an instructable for a lamp and instead of using a normal household light globe ive decided to use LED strips that ive previously used for a computer mod. Theyre 12V and ive wired them up to a 8x AA battery holder with a switch. Wired them up and they work fine but when i turned them off i went to go do something else and came back a few minutes later, the AA batteries were quite hot. What causes this? Have i wired them up wrong? Should i have used a resistor somewhere? Dont have much electronics experience so not sure if theyre in serial or parallel. Cheers for the help guys