Retra Booster for Retra Flash Pro Max, Prime+ and Pure

The 4th generation Retra Flash models have a completely redesigned battery compartment that can now hold 8x AA cells without the need for a separate battery compartment. The new Booster is a singular piece that improves the overall efficiency and reduces the recycle time of the Retra Flash. Exchanging batteries with the Booster is now significantly easier to perform. Simply put in 8x AA cells, screw on the Booster and you're ready to go. And because there are now only two o-rings that need to be maintained the chances of flooding are lower than ever before.