The Booster is a singular piece that increases the performance of the 4th generation Retra Flash models (Pro Max, Prime +, Pure) by giving space for 8x rechargeable AA batteries.

The Booster doubles battery life and reduces the recycle time by more than 50%. Once mounted it is very secure so you can hold on to it while adjusting the strobe underwater.

Estimated shipping date: September/October 2023


Pre-orders available!

Estimated shipping date: September/October 2023

What’s new

  • New lightweight singular piece design
  • 50% weight reduction compared to previous versions of the Supercharger
  • Super easy exchange of the battery compartment lid


Original Retra Flash

Retra Flash Prime/Prime X & Pro/Pro X

Retra Flash Pro Max, Pure, Prime +




Retra Warranty

The Booster includes 2,5 years of Retra Warranty when purchased together with the Retra Flash.

Read more about our Retra Warranty here.

User Manual

User manuals for the Retra Flash are available from our App called "Retra UWT", ready to download for free on Google Play and the App store.

This item contains

  • 1x Booster
  • 1x Carry pouch
  • +6 months Retra Warranty

Sale price€159 EUR ex.VAT

If your shipping address is inside the EU tax zone, VAT is added automatically in the checkout procedure. Import duties and customs fees are not included in our price.

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Do you have any questions?

If you need any additional information about any of our products, please don't hesitate to contact us. We usually respond within 24 hours.