Storage of li-ion light in cars?

19 posts / 0 new
Last post
joecatch
joecatch's picture
Offline
Last seen: 6 years 1 month ago
Joined: 10/19/2012 - 13:52
Posts: 63
Location: New York State
Storage of li-ion light in cars?

I wish to keep my new li-ion 2 battery Trustfire light in my car for emergencies. However, here in NYS the temps inside a car can go from 110F to -20F. Is it OK to keep a high power light in a car year round?

Thanks.

Joe C

Pulsar13
Pulsar13's picture
Offline
Last seen: 1 year 1 month ago
Joined: 02/05/2012 - 10:23
Posts: 1909
Location: Malaysia

I keep my GPS in the car, and the temp here can reach 70C inside there.

There's a big difference in capacity after 6 months - nowadays I can hardly use the GPS for 5 minutes before it needs to be plugged in. So, at minimum, I think extreme heat will damage the battery capacity.

leaftye
Offline
Last seen: 1 week 5 days ago
Joined: 07/25/2012 - 17:43
Posts: 4275
Location: San Diego, CA

The Nissan Leaf battery packs in hot areas haven't done very well.

A flashlight might suffer too, but I don't think it'd be as bad because you wouldn't use it often and probably wouldn't use it at the extreme ends of that temperature range.

The low mode should be lower.

Reviews: Efan IMR18350 700mAh 10.5A, <a href="http://

Don
Don's picture
Offline
Last seen: 3 years 1 month ago
Joined: 01/12/2010 - 16:32
Posts: 6617
Location: Scotland

Non-rechargeable cells tend to do better at very low temperatures than rechargeable ones. Heat above 60C is Not Good for lithium cells – it isn’t good for people either.

 

The numbers from my light tests are always to be found here.

https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...

SpaceCowboy
Offline
Last seen: 9 months 2 weeks ago
Joined: 12/30/2011 - 16:41
Posts: 244
Location: Florida

Problem solved Wink

car refrigerator cooler – warmer when needed refrigerator cooler

baterija
baterija's picture
Offline
Last seen: 4 years 8 months ago
Joined: 03/25/2010 - 03:06
Posts: 223

Heat while fully charged causes degradation in Li-ion permanently reducing capacity. Cold also negatively affects Li-ion more than it does lithium primary cells. It’s kind of the worst of both worlds. For a stick it in the car and forget it until you suddenly need it something stashed with primary CR123s or Energizer AA lithiums tends to work better. They aren’t reusable but then you aren’t using it all that often.

gords1001
gords1001's picture
Offline
Last seen: 1 year 11 months ago
Joined: 05/07/2012 - 14:02
Posts: 5276
Location: wigan england

Or set yourself a routine, once a month cycle out your cells, then you know your cell is a max of a month from last charge. Were lucky in the UK, we don’t get those high temps. I have an ultraok in the glove box, its an xm-l, takes 26650/18650/AAA in a holder. I keep eneloops taped into the 4 x AAA holder and a king Kong in the light and check it once a month for volt level.

I’m also not inclined to eliminate the blinkies. Since it throws pretty well, it can serve not only to investigate the fault but as an additional hazard warning light. Best thing is, its damm cheap off of eBay, the thread is in the 18650 forum and keeps popping up in the recent posts section.

Hang on…..

http://budgetlightforum.com/node/11421

There you go, best of both worlds. :bigsmile:

Ouchyfoot
Ouchyfoot's picture
Offline
Last seen: 2 months 3 weeks ago
Joined: 09/01/2012 - 06:15
Posts: 5089
Location: Canada

Living in Canada I know batteries have a short lifespan being kept in a frozen car. For a car light I prefer lithium primaries . Freezing doesn’t hurt them. Either CR123 or lithium AA primaries in a selection of 1.5, 3.0 or 3.6volts.

Haterade
Offline
Last seen: 4 years 4 months ago
Joined: 09/05/2012 - 20:36
Posts: 1561
Location: District of Corruption

Good thread. Informative. I have been wondering this myself.

I like copper

bfksc
bfksc's picture
Offline
Last seen: 2 years 9 months ago
Joined: 05/18/2012 - 21:12
Posts: 60
Location: Canada

joecatch wrote:
I wish to keep my new li-ion 2 battery Trustfire light in my car for emergencies. However, here in NYS the temps inside a car can go from 110F to -20F. Is it OK to keep a high power light in a car year round?
Thanks.
Joe C

I don’t keep Li-Ion cells in the car. The heat is a killer for them in the summer and the light may not be very bright after several weeks of hot days. I use a single AA Duraloop NiMH cell in my car light and swap it out every month in the summer to ensure it gets cycled with my other NiMH cells and no issues in the summer or winter. While the heat will cause faster self-discharge, it’s not a big issue with Eneloops as they hold their charge longer and they can be recharged whenever you want. Cool conditions for NiMH is not much of an issue.

I carry a Li-Ion 18650 based light in my daily carry bag and that doesn’t see much heat or cold for any lengthy periods, so it works well for me.

Tactical Oatmeal
Tactical Oatmeal's picture
Offline
Last seen: 7 years 3 weeks ago
Joined: 09/27/2012 - 00:46
Posts: 162
Location: DFW, Texas

It gets up to 159,376 degrees F where I live in the summer and my lithiums (primaries) do just fine!

Haterade
Offline
Last seen: 4 years 4 months ago
Joined: 09/05/2012 - 20:36
Posts: 1561
Location: District of Corruption

Are lifepo4 similar to li-ion as far as temps go?

I like copper

MA57
MA57's picture
Offline
Last seen: 5 years 11 months ago
Joined: 05/19/2012 - 11:50
Posts: 22

Haterade wrote:
Are lifepo4 similar to li-ion as far as temps go?

LiFePO4 are much, MUCH better under -+ temp conditions.

They think they have gods on their side… Let them think everything they want, we have tanks on our side!

Don
Don's picture
Offline
Last seen: 3 years 1 month ago
Joined: 01/12/2010 - 16:32
Posts: 6617
Location: Scotland

Not tried LiFe cells at low temperatures. I’ll break out the hobby charger and charge up a couple of them then put them in a pair of U20’s. (XP-G R5 single AA light.)

Then one goes in the freezer overnight and one stays in the kitchen. The cell should stay cold for a minute or so.

My freezer can only hit -25C (13F) but it’ll be interesting to see what happens.

Edit:

I see this is my 6000th post.

 

The numbers from my light tests are always to be found here.

https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...

MA57
MA57's picture
Offline
Last seen: 5 years 11 months ago
Joined: 05/19/2012 - 11:50
Posts: 22

As far as I know LiFePO4 shold stay ok until -30. At lower temp they should lost some capacity.

They think they have gods on their side… Let them think everything they want, we have tanks on our side!

Haterade
Offline
Last seen: 4 years 4 months ago
Joined: 09/05/2012 - 20:36
Posts: 1561
Location: District of Corruption
Don wrote:
I see this is my 6000th post.

Big up Don! Smile

Good to know about LiFe cells. I might go that route for the car.

I am just as concerned with heat as I am cold. Do they do better than li-ion in high temps?

I like copper

ezarc
Offline
Last seen: 10 months 1 week ago
Joined: 10/17/2011 - 18:23
Posts: 2101
Location: South Aus

If its for a emergency I would just get a RC-G2 or similar AA flashlight and plastic case with some OEM Energizer Ultimate Lithium batteries. Then you are good for the next 10 years or so. Or even just some LSD AA’s if you want, if you are feeling rich you could keep a PA40 in there with AA’s.

Haterade
Offline
Last seen: 4 years 4 months ago
Joined: 09/05/2012 - 20:36
Posts: 1561
Location: District of Corruption

Yup. Lithiums are definitely the safest backup. For non-flashtards they are the only way to go.

Funny you mention the PA40…. my old lady’s car carries my old streamlight propolymer 4AA loaded with energizer lithiums.

I like copper

Nope586
Offline
Last seen: 2 years 1 month ago
Joined: 06/25/2012 - 12:31
Posts: 124
Location: Halifax, Nova Scotia, Canada
gords1001 wrote:
Or set yourself a routine, once a month cycle out your cells, then you know your cell is a max of a month from last charge.

This is what I do, I keep my Aurora C6 in the car with 2 extra 18650’s. Every month or two I check them with a multimeter and if needed, charge them or swap them out. In Canada I have to worry more about the low temperatures in the winter than the high in the summer. Of course you’re much more likely to need the light in the dark cold winters.

If I am traveling a long distance though I always pack another light or two with a bunch of extra batteries.