You can share the sun with your WakaWaka for up to 6 to 7 years depending on usage! So be nice to your WakaWaka, it's going to be around for a long time. Note that the leds will run for at least 50,000 hours (based on 4 hours per day = 30 years). When used on a daily base, the lifespan of the battery in the WakaWaka is 3 years. The lifespan is around 6 years when your battery daily depletes for 50%.