From the survey. We can predict that in the future there may be development of smartphones in the period, increasing battery life. Which today are used as substitute energy powerbank.
From the survey, we can predict that in the future might be the development of smartphones in the duration of the battery. Which today are adopting powerbank used as renewable energy.
From the survey, we can predict that in the future there will be the development of smart phone in increasing period use batteries, which nowadays has lead Powerbank use of renewable energy