I want to start on the feasibility study of reusing old mobile phone batteries to prevent creating electronics waste.
The batteries will be used for backup support for tablet or mobile phone. The best case should be utilizing the battery at 3.8V (without boosting up to 5V) to eliminate conversion loss.
The idea is to create some circuit to get different batteries with same voltage level but different capacity to work together to power a equipment such as tablet computer.
You can say, this project is to explore a way let dog, horse, cow and donkey to pull a car together.
I wonder what keywords should I search in the internet or journal articles to begin.
Thank you very much!