thanks for your post,it is useful,let me learn much knowledge to protect my batteries
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I'm a big Chevy Volt fan---can't wait to get one! This survery helped me make decisions about the brand. Please just copy the link.

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I wonder when they say they have tested since 2007-- It's 2010-- 3years test to predict 8 years? I can't agree from my experience of working with L-ion best I have seen is 5 years-- and even go bad sitting on the shelf
Pull quote" Disadvantages
Shelf life

* Charging forms deposits inside the electrolyte that inhibit ion transport. Over time, the cell's capacity diminishes. The increase in internal resistance reduces the cell's ability to deliver current. This problem is more pronounced in high-current applications. The decrease means that older batteries do not charge as much as new ones (charging time required decreases proportionally).
* High charge levels and elevated temperatures (whether from charging or ambient air) hasten capacity loss.[32][33] Charging heat is caused by the carbon anode (typically replaced with lithium titanate which drastically reduces damage from charging, including expansion and other factors).[34]
* A unit that is full most of the time at 25 °C (77 °F) irreversibly loses approximately 20% capacity per year. Poor ventilation may increase temperatures, further shortening battery life. Loss rates vary by temperature: 6% loss at 0 °C (32 °F), 20% at 25 °C (77 °F), and 35% at 40 °C (104 °F). When stored at 40%–60% charge level, the capacity loss is reduced to 2%, 4%, and 15%, respectively


* Charging forms deposits inside the electrolyte that inhibit ion transport. Over time, the cell's capacity diminishes. The increase in internal resistance reduces the cell's ability to deliver current. This problem is more pronounced in high-current applications. The decrease means that older batteries do not charge as much as new ones (charging time required decreases proportionally).
* High charge levels and elevated temperatures (whether from charging or ambient air) hasten capacity loss. Charging heat is caused by the carbon anode (typically replaced with lithium titanate which drastically reduces damage from charging, including expansion and other factors)

lets just Hype this up-- don't confuse my "feeling's" with fact and reality -- this will be a failure--
* A unit that is full most of the time at 25 °C (77 °F) irreversibly loses approximately 20% capacity per year. Poor ventilation may increase temperatures, further shortening battery life. Loss rates vary by temperature: 6% loss at 0 °C (32 °F), 20% at 25 °C (77 °F), and 35% at 40 °C (104 °F). When stored at 40%–60% charge level, the capacity loss is reduced to 2%, 4%, and 15%, respectively

If this was a viable product it wouldn't have to be subsidized--- why should Taxpayers be FORCED to pay for this boondoggle?
Offering vehicles like this --Is it any wonder why GM is bankrupt !!!

When one these cars rolls over and causes a mechanical short circuit-- won't you get toasted to about 2000 degs in a few milliseconds?? I'm serious-- have you ever shorted -- lithium Ion battery?

How much it will be fit for Indian climate, as it is hot zone . what will be the on road price in India.

I am very glad that the Volt gets 40 miles on one charge then a small battery engine kicks in, but I was hoping for and still hoping you can get me a car that can go at least 100 miles before a small gas engine kicks in to run the car. This first Volt is a great starter but I still look forward to more miles to a full charge. Perhaps you could add a second battery to extend the battery range or invent a cleverer battery.

A great article I must say, thanks for updating us about this battery issue.



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Explain A/C and Heating approach and impact on Battery Charge and/or Gas Mileage?

I have a question about leaving the car unattended for an extended amount of time, such as a few weeks or a month. Would the batteries run down from the thermal management? (such as leaving it at the airport) What about leaving it plugged in at home for an extended amount of time?

I am 84 and will be 85 about the time the Volt becomes available. Sure hope to be able to enjoy driving and owning a Volt.

The comparison is kind of silly. However, of the three car manufacturers you mention, Charles, none of them use a lithium ion battery in any of their cars. They're not a direct comparison to the Volt.
Besides, if it weren't for laptop or even cellphone battery longevity demands we would not have seen the breakout of electric vehicles right now. Certainly the Tesla wouldn't be around.
The comparison highlights just how far GM is willing to take a kind of battery that really has no substantial history and back it up for every person that gets one, new or used. Have you read the blog Q&A? The battery will have a good usable life beyond the warranty and GM will have no problem backing it up even in times of a just expired warranty.
It's a good thing.

What company is manufacturing the batteries for GM?

Is there some reason you're comparing the warranty on your $30-40K vehicle to a $499 iPad, a $599 laptop, a $40 cell phone and a boutique automobile built out of laptop batteries? Shouldn't you be comparing to the warranty on a Prius, Fusion or Insight?

That's a better warranty for a major component than anyone in the business. Plus what's the maintenance on the battery? It'd be pretty tough to void the warranty for any reason other than physically trying to alter it.
Step by step we're getting valid and reliable information on the Volt. Soon enough we'll have more information about this car than any vehicle anyone has ever shopped for. This Volt is going to be a good one.

Great warranty. Why not announce the final price? And make more of them available the first year.