The WakaWaka Light is not waterproof, it is water resistant. It can withstand a decent tropical shower when the solar cell is positioned to face the sky. The side of the button and the LEDs are less resistant to water, but tests have shown it can withstand a small rain shower on either side. We don’t advise to leave it out in the rain.
The WakaWaka Power+, Power 5, Power 10, Base 5 and Base 10 all have USB ports and are for this reason not waterproof. It can withstand some drops for sure, but don’t leave them in the rain.
For the WakaWaka Power+ and Light, we have a special Waterproof Pouch that will protect it from the water.