The Fuel Tank Boosterpack (BOOSTXL-BATTPACK) design has a schematic diagram, but slightly low resolution one. I'm unable to discern some of the sub-script(s) here:
RISET = KISET/ IISET; RISET =R1
KISET = 385 A ohms (as per data sheet)
IOUT is currently set to 250 mA? Is this the output (charging) current?