Re: (ET) FYI - Batteries at Sam's Club

["David Roden (Akron OH USA)" <etpost drmm net>]

On 8 Jun 2011 at 14:55, John J Casey wrote:

> Johnson Controls makes the battery in my BMW X5, very likely a quality 
> manufacturer.

Road EVs work their batteries pretty hard, and in that world, Johnson 
Controls is considered a second tier manufacturer.  They're in the same 
league as Exide.  My experience with them echoes this, though I also have 
to 
admit that I was a newbie at the time and didn't care for them well.

Top tier is pretty much limited to Trojan and US Battery.  Depending on 
your 
own experience you might change the order of those two, but they both 
build 
a high quality, long lived battery.  These batteries will last about 3 
years 
in road EV service if well cared for - around 800 cycles.

In an ET, you're less likely to notice the difference between these tiers. 
 
We don't usually cycle our batteries daily - for most of us, 10 years is 
about 500 cycles - nor do we ask them to deliver 400-600 amps for minutes 
at 
a time.