"safe" temperatures for lithium batteries?

In article , ray
wrote:

As with most information on the internet: Caveat Emptor.

very true.

On Tue, 15 Jan 2008 17:06:47 +0000, John Navas wrote:

On Tue, 15 Jan 2008 09:59:08 -0700, ray wrote in
:

On Tue, 15 Jan 2008 08:23:33 -0800, nospam wrote:

In article , ray
wrote:

There is a lot of battery information at 'batterydata.com'.

too bad that it's neither objective nor accurate. that site is
extremely biased in favour of lithium batteries. for instance, he
claims that devices with lithium ion batteries are more reliable
because the battery doors break on devices that use aa batteries. that
has *nothing* to do with the battery and everything to do with the
battery door itself. there are a number of devices with lithium
batteries with crappy doors that prematurely fail.

or his claim that aa batteries are only found on low end products. the
nikon d300 battery grip can take aa batteries. apparently, that's low
end.

As with most information on the internet: Caveat Emptor.

I would say, "It's worth every penny you're paying for it."

"God gave you a brain and expects you to use it." So you're implying that
only expensive things are worth whil? How about, for example, air - or
water. I have found much better informaion on the internet than from sales
people - they generally don't even know what they are selling, and if they
do they have a vested interest.

On Tue, 15 Jan 2008 12:44:40 -0700, ray wrote in
:

On Tue, 15 Jan 2008 17:06:47 +0000, John Navas wrote:

I would say, "It's worth every penny you're paying for it."

"God gave you a brain and expects you to use it." So you're implying that
only expensive things are worth whil? How about, for example, air - or
water. I have found much better informaion on the internet than from sales
people - they generally don't even know what they are selling, and if they
do they have a vested interest.

There is often far more crap on the Internet than valid info, and it can
be very difficult to tell the difference. When you're paying for
information, you get the benefit of screening by someone trained to tell
the difference. That's why, for example, Bloomberg makes so much money.
Sales people are of course another matter entirely, since they are being
paid to influence you.

--
Best regards,
John Navas
Panasonic DMC-FZ8 (and several others)

On Tue, 15 Jan 2008 06:54:42 -0800 (PST), 151 wrote:

I am guesing its a lithium-ion in my case. The reason I ask is that
I left the item near a source of warm air (computer system fan) and
it got quite warm to the touch when I finally moved it.

it would just be nice to have some actual figures for what constitutes
a risky temperature for rechareable li-ion batteries...

Some info is available in the manuals that are provided with the
cameras that use Li-Ion batteries. FWIW, the manuals for several of
the ones I've downloaded (Canon, Nikon, Olympus, etc. - you don't
need to buy cameras to download the manuals) all specify the same
operating temperature range of 0 – +40 °C (+32 – 104 °F).
Unfortunately, they don't mention recommended storage temperature
ranges, which will be somewhat wider. You might be able to get this
information from battery manufacturer's data sheets. The ones
provided by Energizer for their non-rechargeable lithium AA and AAA
batteries shows that they far surpass the recommended range of the
rechargeable Li-Ion batteries, although by how much on the hot end I
can't say, and this won't help you with your current batteries.

[For Energizer's L92 (AA) lithium cells] :
Storage Temp: -40°C to 60°C (-40°F to 140°F)
Operating Temp: -40°C to 60°C (-40°F to 140°F)