KEYSIGHT N6781A Source/Measure Unit Module for battery drain analysis (2-quadrant, 20V, ±3A, 20W)

DC output ratings (volts/amps/watts): 20 V/± 3 A/20 W     

Ripple & noise (p-p/rms): 12 mV/1.2 mV

Voltage programming accuracy: 0.025% + 1.8 mV                               

Current programming accuracy: 0.04% + 0.3 mA

Voltage measurement accuracy: 0.025% + 1.2 mV

Current measurement accuracy: 0.03% + 0.25 mA

See the datasheet to choose suitable options

Datasheet