How to store lithium lawn mower batteries in winter
By My Yard Editorial Team · 7/28/2026
The Quick Answer
Store lithium batteries at 40–60% charge, indoors, between 40–70°F. Storing them fully charged or fully dead in an unheated shed can permanently cut capacity by 20–30%.
The Witty Breakdown
Cold doesn't destroy lithium cells — freezing while charging does, and so does deep discharge over months.
Top them back up to about 50% every three months during storage.
Step-by-Step Fix
- 1
Run or charge the pack to roughly half, not full.
- 2
Bring batteries inside — basement or closet, not the garage.
- 3
Keep them off concrete floors and away from heat sources.
- 4
Check and top off charge quarterly.
Pro-Tip / Do Not Do This
Do not charge a battery that's been sitting at freezing temps. Let it warm to room temperature first or you'll plate the cells.
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