Tesla has quietly made improvements to the Cybertruck’s charging curve, thanks to multiple improvements to its in-house 4680 battery cells and the firmware that controls how the pack charges.
The details come from Cybertruck lead engineer Wes Morrill, who has been sharing some of the many changes Tesla has made to the electric pickup since production began in late 2023. According to Morrill, his team has been able to cut several minutes from the Cybertruck’s 10% to 80% charging time.
“In-house 4680 cells got better, several times actually. And the firmware controls improved as well – both enabled faster Supercharging. Hitting 500kW peak and more importantly shrinking the 10% to 80% charge times by several minutes,” Morrill said.
While hitting a 500kW peak is impressive, we already knew the Cybertruck could achieve that. Morrill highlighted the reduction in overall charging time as more important. Tesla hasn’t said exactly how many minutes have been shaved off a 10% to 80% session, but the gains have come from improvements on both sides of the equation.
According to Morrill, Tesla’s in-house 4680 cells have been improved several times since Cybertruck production began. At the same time, engineers have refined the firmware controlling the battery during fast charging, allowing the truck to sustain a more aggressive charging curve and spend less time plugged in.
In-house 4680 cells got better, several times actually. And the firmware controls improved as well – both enabled faster Supercharging. Hitting 500kW peak and more importantly shrinking the 10% to 80% charge times by several minutes.
— Wes (@wmorrill3) September 13, 2026
Not to mention every efficiency improvement… pic.twitter.com/qH4npbLPwE
The charging improvements are another example of how much the Cybertruck has changed without receiving a traditional refresh. Other recent changes include new composite underbody panels that are lighter and more aerodynamic, along with a redesigned side repeater camera housing that uses airflow to help keep water off the lens.
The latest comments also come shortly after Tesla reached another milestone with its in-house 4680 program. Earlier this month, Tesla built its first Cybertruck using 4680 cells containing lithium refined at its own Gulf Coast Lithium Refinery in Texas.
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