Thank you. And yes, that should work fine. Fully charged, that battery will be 4.2V, so consider adding a resistor for each light in order to meet their 3.7V spec. They will likely tolerate the 4.2V, but at the cost of a reduced total life span. Cheers-Nice video and set up. I wanna ask you if you think a 3.7 volt battery that's 220 mAh can run 4 lights that use 3.7v?