Spaculation: Might Digit V5 use LFP batteries? V5 has an unusually high 10:1 run-to-charge ratio: 90 minutes of runtime and only 9 minutes to recharge. Few battery chemistries are built for that charge rate. LFP is one of them. LFP cells are heavier than most chemistries, but they tolerate 0–100% state of charge, support fast charging, and are less prone to thermal runaway and fire, making them a safer fit for a safety-conscious company. Assuming a 48 V architecture (higher voltages raise safety concerns, and Agility emphasizes safe operation) and a nominal 1 kW operating load. 90 minutes of runtime then implies a 1.5 kWh pack. Recharging that pack in 9 minutes would take about 208 A. Current at that level typically needs liquid cooling, something the robot may already have for high-end compute and sensors. Combined with LFP cells, that would also help explain the large backpack and the extra weight (285 lb). thanks to Jordan @LimitingThe for suggesting LFP as a possibility in our exchange early this morning