Lithium-ion batteries are used in a variety of devices including power tools, cellphones, laptops, lawnmowers etc. The hazards and risks associated with battery charging and storage will depend on the type of battery, how it needs to be charged and maintained, and the area where it is being charged among other factors. Always make sure the charging stations and devices have a Canadian certification mark (e.g., CSA, cUL, cETL), indicating they meet Canadian electrical safety standards (jurisdictions may specify which certification marks are acceptable).
Follow the manufacturer’s instructions for proper charging . Unplug the charger or remove the battery when charging is complete. Do not leave the battery in the charger beyond the recommended charging time – most batteries have built-in protection to prevent overcharging, but for defective or low-quality batteries or a mismatched charger, extra time can result in the battery exploding or catching fire. Charge the battery when it is at room temperature – do not attempt to charge batteries in below-freezing temperatures (unless permitted by the manufacturer).
Do not store batteries where they can touch metal (coins, keys, tools, etc.), as they can catch fire or explode. Remove batteries from devices if not used for extended periods. Store batteries in dry locations away from flammables. Store them with a charge between 30-50%. Check them every 3 months and re-charge to 50% if needed.