What actually determines the current drawn by phone battery? Is it the phone battery (load) or the charger (supply)?
For instance, the charger that came with my phone reads 1.5 A. Also, I have two more chargers available rated 1 A and 2 A. Which one of the two is safe to use with my phone? I have read several claims regarding the same:
Claim 1: Using a less amperage charger would overburden the charger as the current drawn is decided by the load (assuming the load to be resistive)
Claim 2: Using a higher amperage charger would charge the battery faster but at the cost of reduced battery life (implying that current drawn is decided by the charger and the load is capacitive and hence able to absorb any reasonable no of amperes)
My understanding: As I understand, the current should be decided by both the charger and the phone in line with the CCCV scheme.
My questions: Which of the claims is actually true and is my understanding correct? Which of the chargers is theoretically safe to use and what model is an actual representative of the battery (resistive vs capacitive)?