Uploaded August 2024 | Updated September 2026, 1 week ago
Should you charge to 80% or 100%? Does fast charging damage your battery? Dr. Jeff Dahn answers real viewer questions on EV battery health and longevity.
JOIN EV Society and help build sustainable transport evsociety.ca
EVS members enjoy discounted car (& home) insurance. Get a free, no obligation quote:
dulibaninsurance.com/auto-insurance/electric-vehicle-evs
If you missed Dr. Dahn's last presentation on Canada Talks Electric Cars watch it now: youtube.com/watch?v=i31x5JW361k&t=1s
Referenced during video Peak Power V2G youtube.com/watch?v=jHhDs2B4IuU
Canada Talks Electric Cars Previous Episodes:youtube.com/playlist?list=PLgmymQuAYlURyz27qs3Nrum3krmv9zo0J
Shout out to Jason and Engineering Explained for promoting Jeff's last video with us:
youtube.com/@UClqhvGmHcvWL9w3R48t9QXQ
0:00 Intro & Welcome
1:40 Today's Topics Overview
2:40 NMC Batteries: How Charging Range Affects Longevity
5:09 Real Data: Years of Lab Testing & What It Means for You
9:20 Practical Charging Advice: The 70–80% Rule
9:46 High-Nickel NMC & Why 80% Matters Even More
16:21 LFP Batteries: Why Charging to 100% Is Fine
17:51 Why LFP Loses Range Accuracy (Flat Voltage Curve)
20:14 Vehicle to Grid (V2G): How It Works & Canada's Progress
22:38 Second Use EV Batteries: A Growing Industry
25:17 Q&A Begins
29:00 Q: Why can't the car just manage charging automatically?
31:51 Q: Why did LFP take so long to reach EVs?
33:28 Q: Do EV batteries really need replacing every 10 years?
39:27 Q: Blood Cobalt — Is It Still an Issue?
45:50 Q: Are Canadian battery factories obsolete before Solid State?
52:13 Q: Is Jeff still funded by Tesla?
53:39 Closing & Next Episode
Should you charge to 80% or 100%? Does fast charging damage your battery? Dr. Jeff Dahn answers real viewer questions on EV battery health and longevity.
JOIN EV Society and help build sustainable transport evsociety.ca
EVS members enjoy discounted car (& home) insurance. Get a free, no obligation quote:
dulibaninsurance.com/auto-insurance/electric-vehicle-evs
If you missed Dr. Dahn's last presentation on Canada Talks Electric Cars watch it now: youtube.com/watch?v=i31x5JW361k&t=1s
Referenced during video Peak Power V2G youtube.com/watch?v=jHhDs2B4IuU
Canada Talks Electric Cars Previous Episodes:youtube.com/playlist?list=PLgmymQuAYlURyz27qs3Nrum3krmv9zo0J
Shout out to Jason and Engineering Explained for promoting Jeff's last video with us:
youtube.com/@UClqhvGmHcvWL9w3R48t9QXQ
0:00 Intro & Welcome
1:40 Today's Topics Overview
2:40 NMC Batteries: How Charging Range Affects Longevity
5:09 Real Data: Years of Lab Testing & What It Means for You
9:20 Practical Charging Advice: The 70–80% Rule
9:46 High-Nickel NMC & Why 80% Matters Even More
16:21 LFP Batteries: Why Charging to 100% Is Fine
17:51 Why LFP Loses Range Accuracy (Flat Voltage Curve)
20:14 Vehicle to Grid (V2G): How It Works & Canada's Progress
22:38 Second Use EV Batteries: A Growing Industry
25:17 Q&A Begins
29:00 Q: Why can't the car just manage charging automatically?
31:51 Q: Why did LFP take so long to reach EVs?
33:28 Q: Do EV batteries really need replacing every 10 years?
39:27 Q: Blood Cobalt — Is It Still an Issue?
45:50 Q: Are Canadian battery factories obsolete before Solid State?
52:13 Q: Is Jeff still funded by Tesla?
53:39 Closing & Next Episode
