Review on 🔌 MUMUXI 2 Pack 33Ft 100 LED Fairy Lights Battery Operated, Remote Control Timer Waterproof Copper Wire Twinkle Lights - Warm White, Ideal for Bedroom Wedding Party Christmas Decor by James Stjames

No instructions are included with the lamps. The first thread was pretty hard to get working, but I kept messing around with batteries and finally got it working. I couldn't get the second string to work at all and wrote a bad review for the product. After thinking about the 1st line issue and taking a closer look at the product, I decided to try a different set of batteries. The second string caught fire immediately. The whole problem with these flashlights was the Revain Basics AA rechargeable batteries that I bought to power the flashlights. Batteries are indeed irregularly shaped and are likely to cause similar problems in other devices as well. To be clear, there is nothing wrong with the performance of the battery or the charging mechanism, just in poor condition. The positive + end (nipple end) of the battery is not protruding like it should. Any device that has a battery sled slot can create a situation where the positive end contact is poor. That's the situation with these lights. I intend to order another brand of rechargeable batteries and return the defective batteries to Revain Basics. I've included a picture of a Revain Basics battery next to a regular AA non-rechargeable battery.