[nn0wheremann]

Originally Posted by villagetinker

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.

I bought a Rockwell brand lithium battery powered drill and saw set at least 20 years ago from Menards in Chicago. Been in the garage there and here ever since. Extreme cold, extreme heat. Both batteries work just fine. No problems at all.

[Bill14564]

Originally Posted by Villagesgal

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

Are you sure those were lithium batteries? I had a similar experience with a NiCad battery set. The lithium I have now has been through two summers with no noticeable degradation

[nn0wheremann]

Originally Posted by nn0wheremann

I bought a Rockwell brand lithium battery powered drill and saw set at least 20 years ago from Menards in Chicago. Been in the garage there and here ever since. Extreme cold, extreme heat. Both batteries work just fine. No problems at all.

Come to think of it, my Dell laptop is only 11 years old, has stayed in controlled temperatures indoors all that time, and it is on its third set of lithium batteries. Perhaps frequent charge / discharge cycles have more to do with lithium battery life than storage temperature.

[Cuervo]

Originally Posted by justjim

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

I'm not sure what your response was to my posting and if you believe that my posting would promote garage fires.

Also, I'm not sure what the regulations are here in FL. but if it's like most places I've lived, garages usually have fire doors and are built to be standalone from the rest of the house assuring some safety to the occupants giving them time to vacate.

[HJBeck]

Agree, there are quite a few instances of Lithium Ion batteries catching on fire.

[Vermilion Villager]

Originally Posted by Topspinmo

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?

I leave my lithium battery power drills in the garage when I leave to go up north. I've also left my lithium battery powered golf cart in the garage. I've been doing this for three years without any issues. I do not leave any of them on the charger when I'm gone.

[NoMoSno]

"Environmental conditions, not cycling alone, govern the longevity of lithium-ion batteries. The worst situation is keeping a fully charged battery at elevated temperatures. Battery packs do not die suddenly, but the runtime gradually shortens as the capacity fades."

"Lithium-ion suffers from stress when exposed to heat, so does keeping a cell at a high charge voltage. A battery dwelling above 30°C (86°F) is considered elevated temperature and for most Li-ion a voltage above 4.10V/cell is deemed as high voltage. Exposing the battery to high temperature and dwelling in a full state-of-charge for an extended time can be more stressful than cycling."

BU-808: How to Prolong Lithium-based Batteries - Battery University

[justjim]

How hot it’s going to get in your garage depends upon the direction your garage door/doors faces. It makes sense that heat is not good for any battery. Fires are rare but they happen occasionally. It is inconvenient to store battery tools in the house and going back and forth to the garage. My wife expects tools to be in the garage and not in the house closets. Following retirement, I got rid of a lot of tools, play more golf, travel/vacation and use my checkbook instead. To each their own.

[OhioBuckeye]

Just saw a special on TV about lithium batteries, those battery they said generate more heat & will catch fire. I’m not a big fan of lithium batteries, to many people that have these kind of batteries you’re messing with fire no Pune intended. I know people that have lithium batteries in anything will tell you that’s not true. But just beware don’t leave chargers on lithium batteries. Especially on golf carts or Any kind of EV. Besides they’re expensive to replace! They will last longer but they will get hot & burn & fires are hard to put out & expensive to replace!

[Battlebasset]

Originally Posted by Topspinmo

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?

All of my lawn equipment is lithium ion now. To help address the hot garage issue I ran a power strip into my garage air handling closet where all of the charging takes place. With the AC leakage that takes place as it moves up and out into my house, the closet stays around 80. Cooler would be better, but I don't want a bunch of batteries taking up space in my house. Going on three years, all the batteries are fine.

I also have a lithium ion golf cart. Not much I can do about a hot garage there. However, I don't leave it on the charger once it is fully charged. Unplug it, and don't recharge until I've run it down to at least 85%. Figure that would also protect me from a power surge that could cause problems if connected.