A 24V cordless drill is powered by a pack of six to seven lithium-ion cells linked together in a series. That extra voltage means more torque for tough jobs, but it also means more energy to manage safely. Always inspect packs for damage before use, avoid leaving packs on the charger, and don’t store them in your garage or shed where temperature fluctuates.

A single e-scooter can carry more than 100 lithium-ion cells. That much stored energy means fires and the toxic smoke it produces can become life-threatening almost immediately. Research from UL Research Institutes shows that an e-bike fire can fully engulf a room in flames in less than 20 seconds. Store them away from bedrooms and escape routes and preferably behind a closed door. Don’t modify the battery and always inspect for swelling, damage, or strange odors before charging or riding.

Laptops, tablets, and many everyday devices use flat, pouch-style lithium-ion cells stacked together in a pack. This design is popular for its slim size and heat efficiency, but like all lithium-ion batteries, it requires proper care. Keep them in your carry-on when flying, don’t leave them in hot cars, and check for signs of swelling or damage before use.

A 10-cell lithium-ion battery pack gives this cordless vacuum the power it needs to clean, but more cells also mean greater risk. Replacement packs from uncertified sources can increase that danger. Always purchase batteries directly from the manufacturer or an authorized retailer. Always charge in a well-ventilated area, keep away from heat, and never continue using a pack that feels unusually hot.

RC cars and other rechargeable toys are often powered by lithium-ion battery packs with multiple cells. Safe play means safe charging: only use the charger supplied by the manufacturer, keep an eye on toys while they’re plugged in, and avoid charging on soft surfaces where heat can build up.

Over-ear wireless headphones usually run on a single lithium-ion battery cell. Even one cell stores a lot of energy so avoid puncturing, crushing, or exposing them to heat to reduce fire risk. When traveling, always pack them in your carry-on for safer monitoring.