Why do I need to bring in my charger in the winter?

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This is my first winter with my Ego Mower. I have read and understand that I need to store my battery (with a 30% charge) in the basement during the winter.  But I do not understand why I can't just unplug the charger and leave it mounted on the garage wall.  Why should it also be moved into the house?
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Tom Hattan

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Posted 2 years ago

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szwoopp, Champion

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You can leave your charger wherever you like.  But, it is an electronic devise and is probably best served to be kept from any extreme temperatures and moisture.

Also note the 30% is an automated function of the battery.
This battery pack is equipped with an advanced self-maintenance function
to extend the battery life. Depending on the battery charge, it will automatically perform
a self-discharge operation after one month of storage. After this self-maintenance, the
battery pack will enter sleep mode and maintain 30% of its charge capacity. If stored
for a month or longer, fully recharge the battery before the next use.
It is not necessary to run down the battery pack charge before recharging. The Lithium-
Ion battery can be charged at any time and will not develop a “memory” when charged
after only a partial discharge. Use the power indicator to determine when the battery
pack needs to be recharged
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I leave all my chargers in the garage, and just the batteries in, no issues..
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Paul Christenson

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I bring in my chargers because I'm charging my snow blower and chain saw batteries during the winter...:)
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Oregon Mike, Champion

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Truth be told, I keep batteries and chargers in the garage. We rarely get below the 20s at night and it's not for very long when we do. Garage is unheated but it seems to remain slightly warmer overnight than outside temp. I don't charge batteries unless temps are above 30. 
Just finishing up our 3rd season with a 2.5ah battery and a 5 ah battery and they both still seem to be working good as new. Granted, they see very little use in the winter here. Not enough snow to need a snow blower, and grass slows to a crawl/stops growing over the winter. Although if these drought conditions continue here I might end up using the tools a bit longer this season than in previous seasons.
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During the coldest months of South Dakota, I usually bring my batteries in. I have a couple chargers, so I leave one of my chargers in the garage year round.

As a general rule, Lithium Ion batteries don't like extreme temperatures. Year round, it's my habit to only keep batteries in my garage that I'm actively using and to store the remaining batteries in my downstairs. I figure if the environment in my non-temperature controlled garage becomes "unfriendly" for battery life...I've at least protected some of my batteries by storing them in my house at room temperature.
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Paul Christenson

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This is why you bring those things in from unheated areas...:)