The recent batch (MID- 2022) ReyLight Triple Dawn could only use button tops or longer 18650 cells because of the spring on the switch/pcb was too short, this is a modified version with dual gold-plated springs for added strength and longer life, with this replacement switch you can use flat top unprotected cells. All my stock Triple Dawn will have these modified switches if you gotten your light from Rey directly you will have the stock spring.  

You will need a tool from Rey or a good c-clip pliers or crclip pliers to remove the tail switch button. I will stock the tool later. 

NOTE: THE 1ST BATCH TRIPLE DAWN I HAD STRETCHED THE STOCK SPRING BUT LATER IT STARTER TO COMPRESS BACK DOWN AND YOU WILL END UP NEEDING A BUTTON TOP 18650 BATTERY.