There are 3 options....on, timer, and off. We didn't click it twice the first time we used them, so they stayed on all night. When you select timer, it will start the lights in a 6 hr on and 18 hour off cycle. You don't have to reset it unless you want them to start at a different time. We love the set it once and forget it feature.
Hello pbrig, thank you for the question. Battery lifetime depends on many factors -- the battery type, the battery maker and ambient temperature for example. Battery lifetime vary considerably so a specific answer is not available. If you have any other questions, please feel free to contact our consumer care team at 888-919-0070 or 'warranty@polygroup.com'. Best Regards, Polygroup Manufacturer
Dear Valued Consumer, thank you for the question. The Home Accents Holiday 33 ft. 100-Light LED Multi-Colored Battery Operated Mini String Lights (L6100010MU01) features 26 gauge wire. If you have any other questions, please feel free to contact our consumer care team at 888-919-0070 or 'warranty@polygroup.com'. Best Regards, Polygroup Manufacturer