Thunderbolt EVGuides on choosing an EV, charging at home and on the road,

Battery & Range

Degradation, warranty, winter range and highway efficiency.

EV Battery Degradation Explained: What to Expect After 5 Years
Battery & Range

EV Battery Degradation Explained: What to Expect After 5 Years

Real-world data shows most EV batteries lose capacity slowly. What degradation looks like, what the warranty covers, and how to slow it down.

Winter Driving and Highway Range: What Cold Does to an EV
Battery & Range

Winter Driving and Highway Range: What Cold Does to an EV

Cold weather and motorway speeds are the two biggest range eaters. Realistic loss figures and the habits that win the range back.

How to Extend Your EV Battery Life: Daily Habits That Actually Work
Battery & Range

How to Extend Your EV Battery Life: Daily Habits That Actually Work

Modern EV batteries lose capacity through a mix of cycle ageing and calendar ageing, but daily habits can keep degradation to the fleet average of 1-2 percent p

EV Battery Warranties Explained: What 8 Years and 100,000 Miles Really Cover
Battery & Range

EV Battery Warranties Explained: What 8 Years and 100,000 Miles Really Cover

Most electric vehicle batteries in the UK come with a warranty of eight years or 100,000 miles, whichever comes first, and the manufacturer will usually repair

Miles per kWh Explained: The EV Efficiency Number That Matters More Than Range
Battery & Range

Miles per kWh Explained: The EV Efficiency Number That Matters More Than Range

Electric vehicle efficiency, measured in miles per kWh, reveals far more about real-world running costs than headline range figures alone. A family hatchback ac

What Happens to Old EV Batteries? Recycling and Second Life in 2026
Battery & Range

What Happens to Old EV Batteries? Recycling and Second Life in 2026

Electric vehicle batteries rarely fail completely. Most packs in the UK retain between 70 and 80 percent of their original capacity after 100,000 to 150,000 mil