Key points in this article
The one conclusion to keep
If you remember only one thing, let it be sampling first then promoting. Around winter charging this holds in most cases, and early attention usually costs less than the repair that follows later neglect of cold-weather specifics by owners.
Signals worth noting
Some device changes are not urgent yet deserve a note. A practical test is turning cases into reusable mechanisms; when unsure, ask rather than assume. Most trouble we logged came from the temptation to take a shortcut around the steps.
Safety bottom lines
Do not modify or add parts yourself. Stop immediately on abnormal heat or smell. Delay outdoor charging in thunderstorms. Keep children and pets away from the charging area, and watch cold-weather performance changes closely each morning.
Low temperatures raise resistance and alter how a battery accepts charge, so winter is when hidden costs surface. A pre-season check of cabling and contacts is the cheap insurance that keeps a small efficiency loss from becoming a frozen, expensive failure.