October 28, 2026 — You can have a perfectly good cordless drill in July and wonder why the same battery seems weak in January. Cold affects the performance of lithium-ion power-tool packs, and the way they are stored or charged can matter as much as the temperature outside. Before winter arrives, give your chargers, batteries and garage storage setup a careful once-over.

Why a cold battery may feel dead

Battery chemistry works differently at low temperatures. A pack that’s been left in an unheated shed may show reduced available power under load. That doesn’t necessarily mean the pack is permanently worn out. Let the equipment return to the temperature range specified by its manufacturer and check it again before spending money on a replacement.

Charging is different from using

Many lithium-ion charging systems restrict charging when the battery is too cold or too hot. Don’t defeat a charger’s protection or try to warm a pack with a torch, space heater or direct flame. Move the battery to a dry, suitable indoor location and allow it to reach the manufacturer’s charging range naturally. Then use the compatible charger specified for that pack.

Where should batteries spend the winter?

Choose a clean, dry location away from standing water, combustible clutter and extreme temperature swings. Avoid storing batteries in a hot vehicle during summer or directly against heating equipment in winter. Check the instructions for your exact brand and model because storage recommendations, charge levels and operating temperature limits differ.

Inspect the pack before clicking it into a tool

Look for cracked cases, swelling, impact damage, melted plastic, wet terminals or an unusual odor. A damaged or hot battery should not be placed on a charger just to see whether it works. Stop using it, isolate it appropriately without handling a smoking or dangerously hot pack, and follow the manufacturer’s service or disposal guidance. Never throw a rechargeable lithium-ion pack into household trash.

Check the contacts and the charger

With everything disconnected from power, inspect for contamination and visible corrosion. Don’t insert metal objects into contacts or improvise repairs to a damaged charger cord. If a charger shows a fault indicator, consult the manual instead of assuming every warning means the pack is bad. Chargers and batteries are a matched system, not universal accessories.

A practical setup for working homeowners

If you use one battery family for drills, impacts, lights and saws, label each pack discreetly and rotate usage. Store chargers where spills, sawdust and wet boots won’t surround them. Keep at least one working pack ready within the manufacturer’s recommended conditions for unexpected home repairs, but never leave a questionable pack plugged in unattended.

At Handyman Problem Fixer, practical maintenance matters more than buying another tool you don’t need. A five-minute battery inspection can help avoid wasted troubleshooting when the temperatures drop.

Safety note: This is general lithium-ion care advice. Always follow the battery and charger manufacturer’s specific instructions; never attempt cell-level battery repair.