#BatteryLife

Marc writes:

Hi, I haven’t seen this addressed anywhere.

I have 2006 Lexus RX400H with 106,000 miles. The vehicle is bulletproof never having a repair, it even has it’s original brakes. I traded in a 2000 RX 300 for it. The 300 also never had a repair.

Tesla Roadster battery pack – Tesla Photo

One drawback to cars that run on batteries is that over time and multiple charge/discharge cycles, batteries will lose capacity. Individual cells start to fail to meet specifications and when enough cells go bad, it’s time for another battery pack. Since capacity is directly related to range and since battery packs are expensive to replace, how quickly batteries deteriorate is an important factor in the overall cost and practicality of EVs.

Day six brought a typical Northern California morning: it was 41 degrees, foggy and raining in my forest. But because I was driving an electric vehicle, a squirrel greeted me at the doorstep to thank me for saving his home and a group of hummingbirds dried my charging cable with their tiny wings so I wouldn’t electrocute myself as I unplugged. Then I woke up. But it was still 41. And foggy. And raining.

Lynn writes:

Hi Sajeev,

I enjoy your columns for their history and technology surprises of what might be wrong. Two history questions: