Automated NiCad battery tester for calibration lab. Tests all 12 cells of a meter's battery pack in situ (no disconnect) under a 150 ▎ Ω / 15-min timed load. Per-cell measurement via 13 pogo contacts (7 rail + 6 V-gap junctions) into 4× ADS1115 over I²C. ESP32-S3 controls a logic-level MOSFET for load ▎ switching. Wirelessly prints PCL5 reports to an HP printer and ZPL labels to a Zebra. Production target: 10–12 units. Bench rig already validated; this is the production PCB.