Do you have 2 batteries? One poor batterie can definitely drag down a good battery. Always replace both. However by guess is you got a defective battery. I don't buy cheap batteries for the 5th. Do some research and buy the top quality. I really don't think run the slides in and out and 20 minutes of a few lights would do all that. If the new battery is a little weak what you did would definitely drag it down. Pull battery and take to dealer and have them run tests on the battery and they can tell if it is bad. Check water in battery and if one cell is way down on water that is probably a bad cell, and new battery would need to be replaced. Good luck.