Lithium ion battery storage
 

Beings my garage has been hovering around 90 degrees for couple weeks now (hotter when I pull my car in till it cools) I store my tool batteries in side house where the air regulated at 76.

Seems like there lots of opinions on temperature storage on these batteries ranging from 77F degrees to 105 or 149F. My ego 56v batteries (5 and 9 AHs ) are 400 plus to replace so want them last as long as possible. I also brought in my 12V and 21v also.

Even with garage well ventilated the temperature builds about same in late afternoons to early evening. I figure I got over 600 Bucks in these batteries and want them to last long as possible. I also let them cool before recharging.

I checked my car battery temps after trip it’s temps are 110 to 115F nothing I can do about that except raise car hood to let heat out so it don’t set there and cook. I guess that’s why car batteries don’t last very long here in Florida?

When we bought all of our ego products, sales guy strongly recommended bringing batteries inside. Otherwise shelf life is half

Probably a wise thing to do.

I put shelving in the air handler closet, it stays close to interior temperature when running.

Unfortunately my air handler in garage.

You are extreme, LOL. Extreme cold and hot are common in the Midwest so I guess I need to raise my hood in summer and put a blanket on it in winter? If you’re that concerned, bring them inside or maybe consider conditioning your garage and you will sleep better at night.

Feel better now. :popcorn:

Most of my battery powered equipment had warnings about temperature ranges, I would expect the same for the newer Lithium ION batteries, I have a Craftsman tool that uses these, and it sat for 3 years in the cabinet in the garage and I went to use it and it still was charged. I think I may do a search on this subject just to see what comes up.

All my power equipment tool lithium batteries are stored inside the house whenever not being used except for during the cooler winter months. Why risk it when they only take up a little space in a utility closet?

I have a number of tools all battery powered and as suggested I looked on the internet and the answer varied to size and so did the temperatures.
My question now is it safe to store a large amount of these type of batteries in the home.
If not, my life is more important to me than the life of a battery.

The recommended storage temperature for most batteries is 15°C (59°F); the extreme allowable temperature is –40°C to 50°C (–40°C to 122°F) for most chemistries.

link

I've kept mine in the garage for year, no difference in life. As for the car batteries, there is more to it that just that. Depends on where you live.

I’ve been wondering why most fires in TV start in the garage. Thanks to everybody posting such information on this thread.

Garage conditioning
 

We priced putting automatic screens on our garage which came in around $7,000-$9,000. Garage would still be hot and humid. We decided to put a 2 ton ductless Mitsubishi unit in instead. Our air handler is also in the garage as well as a refrigerator freezer. These are 21 seer rated units. I will keep temp around 80° . Monthly cost will be minimal.

I store mine inside after the first one went dead after only one summer. The replacement for that is on year 3 now.

Interesting topic. I just brought my two lithium batteries inside based on this information.