Humanoid robots no longer have a walking problem — they have a charging problem. Agility Robotics announced on October 15 that it has named Nyobolt the exclusive battery technology partner for Digit 5, and the numbers are the story: 90 minutes of work from a 9-minute charge.
The new battery system delivers a 10:1 run-to-charge ratio — up from Digit 4’s 2:1 — which Agility says lets Digit 5 do more than 20 hours of productive work in a 24-hour day. That’s better than two full warehouse shifts from a single robot.
Nine minutes plugged in, ninety minutes on the clock
“For our customers, Digit’s uptime is the business case,” said Daniel Diez, Agility’s chief business officer. “Digit 5 will deliver more than 20 hours of productive work in a 24-hour day, more than two full shifts. That’s the kind of gain that materially improves the value customers get from Digit and the economics of deploying a humanoid robot fleet.”
Nyobolt co-founder and CEO Sai Shivareddy said Agility “set an exceptionally high bar for what a battery has to withstand in live warehouse and manufacturing environments.” Nyobolt, founded in 2019 in Cambridge, UK, builds high-power battery systems around proprietary anode materials and integrated power electronics — technology it previously aimed at AI data centers and EVs, now engineered for the toughest conditions in what it calls physical AI.
Early access to Nyobolt-equipped Digit 5 units is expected in the first half of 2027, with availability widening over the following six to nine months for manufacturing, warehouse, and distribution operators.
The math that matters
Here’s what the ratio jump actually buys. A 2:1 run-to-charge ratio means a robot spends roughly a third of its day tethered to a charger — about 67% uptime. At 10:1, uptime climbs to roughly 91%: 90 minutes working, 9 minutes charging, on repeat. That is the difference between keeping a spare fleet to cover charging gaps and running one robot straight across two full shifts.
As The Robot Report notes, the battery deal lands a month after Agility unveiled Digit 5 — its first humanoid designed for cooperatively safe work at scale — and alongside the company’s admission that it is weighing wheeled locomotion against the new-generation legs Digit 5 just got. Every variable that touches fleet economics is on the table.
Why this matters
This is the first time a major humanoid maker has designed around the shift clock instead of the demo reel. Digit already has more than 65,000 hours of real-world operation at customer sites, and the Nyobolt partnership converts that field experience into the one metric warehouse operators actually price: productive hours per robot per day. With Agility’s Nasdaq listing — via its combination with Churchill Capital Corp XI, expected to close this quarter — as TechXova previously reported, the company needs Digit 5 to arrive as a deployable product, not a research milestone. A 9-minute charge is its most persuasive argument yet.
The caveat: every performance figure here is the companies’ claim. The 20-hour day only becomes real when independent customer deployments confirm it.
Meanwhile in Robotics: Agility Robotics’ Nasdaq listing cleared its final SEC hurdle, and Tesla is ramping Optimus production toward hundreds of units per week.
