Uploaded August 2023 | Updated September 2026, 1 week ago
How long do EV batteries really last — and what can owners do to protect them?
In this classic Canada Talks Electric Cars presentation, Dr. Jeff Dahn explains why lithium-ion batteries degrade, what actually affects EV battery life, and the practical operating habits that can help maximize long-term battery health.
Dr. Dahn covers lithium-ion battery basics, charging habits, state of charge, depth of discharge, temperature, storage, battery chemistry, microcracking, single-crystal cathode materials, vehicle-to-grid potential, and what sodium-ion battery technology could mean for the future.
Dr. Jeff Dahn is one of the world’s leading lithium-ion battery researchers and a pioneering figure in the development of the lithium-ion battery technology now used in laptops, cell phones, energy storage systems, and electric vehicles. He is a professor in the Department of Physics & Atmospheric Science and the Department of Chemistry at Dalhousie University.
This episode remains one of EV Society’s most-watched Canada Talks Electric Cars presentations because it answers one of the biggest questions EV owners and EV shoppers have: how to make an EV battery last as long as possible.
Chapters:
00:00 Welcome and why EV battery health matters
03:02 What EV owners can do to maximize battery life
03:43 Lithium-ion battery basics
05:07 NMC battery chemistry explained
06:06 Why lithium-ion batteries degrade
07:18 State of charge, voltage and battery stress
08:27 Storage, temperature and capacity loss
10:27 Why smaller charging ranges reduce degradation
13:14 First takeaway: store lower in hot weather
14:19 Microcracking and battery wear
19:12 Depth of discharge and cycle life
22:05 Second takeaway: charge more often when practical
23:00 What X-ray imaging reveals inside the battery
26:10 Single-crystal materials and longer battery life
31:06 Batteries for vehicle-to-grid applications
32:00 High-nickel batteries and longer driving range
35:10 Why charging to 75% can help
37:18 Third takeaway: daily charging guidance for long-range EVs
38:15 Sodium-ion batteries: promise and limitations
41:08 Summary: the main rules for maximizing EV battery life
43:02 Q&A begins
45:20 Battery capacity and cold weather
46:26 Level 1, Level 2 and DC fast charging
47:30 Winter storage and battery care
48:06 Why battery chemistry is hard for consumers to find
50:00 EV battery warranties and real-world longevity
52:16 Is there an ideal state of charge?
54:18 Vehicle-to-grid at larger scale
55:35 Should you charge to 60% or 80%?
56:08 Battery recycling and future material value
57:20 Closing remarks
View all past Canada Talks Electric Cars episodes:
tinyurl.com/4v4cx9nn
#ElectricVehicles #EVBattery #BatteryHealth #LithiumIonBattery #EVOwnership #EVCharging #CanadaTalksElectricCars #EVSociety
How long do EV batteries really last — and what can owners do to protect them?
In this classic Canada Talks Electric Cars presentation, Dr. Jeff Dahn explains why lithium-ion batteries degrade, what actually affects EV battery life, and the practical operating habits that can help maximize long-term battery health.
Dr. Dahn covers lithium-ion battery basics, charging habits, state of charge, depth of discharge, temperature, storage, battery chemistry, microcracking, single-crystal cathode materials, vehicle-to-grid potential, and what sodium-ion battery technology could mean for the future.
Dr. Jeff Dahn is one of the world’s leading lithium-ion battery researchers and a pioneering figure in the development of the lithium-ion battery technology now used in laptops, cell phones, energy storage systems, and electric vehicles. He is a professor in the Department of Physics & Atmospheric Science and the Department of Chemistry at Dalhousie University.
This episode remains one of EV Society’s most-watched Canada Talks Electric Cars presentations because it answers one of the biggest questions EV owners and EV shoppers have: how to make an EV battery last as long as possible.
Chapters:
00:00 Welcome and why EV battery health matters
03:02 What EV owners can do to maximize battery life
03:43 Lithium-ion battery basics
05:07 NMC battery chemistry explained
06:06 Why lithium-ion batteries degrade
07:18 State of charge, voltage and battery stress
08:27 Storage, temperature and capacity loss
10:27 Why smaller charging ranges reduce degradation
13:14 First takeaway: store lower in hot weather
14:19 Microcracking and battery wear
19:12 Depth of discharge and cycle life
22:05 Second takeaway: charge more often when practical
23:00 What X-ray imaging reveals inside the battery
26:10 Single-crystal materials and longer battery life
31:06 Batteries for vehicle-to-grid applications
32:00 High-nickel batteries and longer driving range
35:10 Why charging to 75% can help
37:18 Third takeaway: daily charging guidance for long-range EVs
38:15 Sodium-ion batteries: promise and limitations
41:08 Summary: the main rules for maximizing EV battery life
43:02 Q&A begins
45:20 Battery capacity and cold weather
46:26 Level 1, Level 2 and DC fast charging
47:30 Winter storage and battery care
48:06 Why battery chemistry is hard for consumers to find
50:00 EV battery warranties and real-world longevity
52:16 Is there an ideal state of charge?
54:18 Vehicle-to-grid at larger scale
55:35 Should you charge to 60% or 80%?
56:08 Battery recycling and future material value
57:20 Closing remarks
View all past Canada Talks Electric Cars episodes:
tinyurl.com/4v4cx9nn
#ElectricVehicles #EVBattery #BatteryHealth #LithiumIonBattery #EVOwnership #EVCharging #CanadaTalksElectricCars #EVSociety
