Hello,
I am building a setup in which the BQ25504 is connected to a small PV panel and trickle charging a single cell LiPo battery (connected on the VBAT pin). I want to also charge the battery through a small LiPo charger circuit powered from the USB bus. I have connected the output of the USB charger to the battery, in parallel with the BQ25504 circuit. Are there any problems that might arise from this? I am noticing a decrease in battery voltage when the USB charger is connected.