Hi experts,
Im trying to choose battery charger for 3.7 (4.2v max) 4000mAh battery,
I'm trying to use bq25303jevm,
I swap the 2 amp charge limit resistor to 16k to get about 2.5A charge current.
This is the setup:
Vin 5v, 5A power supply input to the board,
0.01ohm resistor in series to the battery.
Input current 2.5A, output 3.8v 2A.
The problem is that im getting low efficiency (about 60%).
Why is that?
