4000mah Dual Battery System
Storm is featuring with 4000mah dual battery system, one is 1500mah built-in battery, another is 2500mah removable battery.
You don’t need to worry at all no matter which one is power off, the other one will supply power automatically.
So it is quite user-friendly when you are on traveling.
Besides,there is also a storage jar in the removable battery part. You can put some flowers in it, no need an additional jar to carry flower again.