Introduction

Lithium-ion batteries have the potential to be dangerous if mishandled, although they are not inherently hazardous. It is crucial to familiarise yourself with these guidelines to ensure safety for both you and your devices. These rules apply to 18650, 21700, 20700, 26650 and similar cell types.

Avoid Loose Batteries in Your Pocket

To prevent incidents, always store batteries in their protective case when not in use. Never carry loose cells alongside keys, coins, or any metal objects. Short-circuits from improper storage are the leading cause of battery-related fires. If you carry multiple cells, invest in a robust EVA case that holds up to four 18650s safely.

Protect Battery Wraps and Insulators

Regularly inspect your cells’ wraps and top insulators for tears or damage. A compromised wrap or insulator risks bridging the positive and negative terminals—this can overheat or even explode the cell.

If the wrap is torn, either re-wrap with a repair kit or dispose of the cell at a proper recycling point. Retailers can also re-wrap and replace insulators if needed.

Avoid Using Damaged Batteries

Never use cells with nicks, gaps, or exposed metal. Dispose of damaged batteries immediately—do not attempt to crush, incinerate, or modify them. If you’re confident, use a wrap-repair kit following trusted online tutorials, but err on the side of safety and recycle any suspect cells.

Never Leave Batteries Unattended While Charging

Charge lithium-ion cells only in a dedicated charger designed for them. Always remain nearby during charging and disconnect cells once complete. Charger malfunctions are rare but possible—monitor the process to prevent overcharging. For charger recommendations, consult our Battery Safety Guide or contact our team.

Top 10 Tips for Lithium-Ion Battery Safety

• Always store your batteries in a case when not in use.
• Avoid exposing batteries to direct sunlight or high temperatures.
• Keep batteries away from flammable materials.
• Never leave charging batteries unattended.
• Prevent contact with static electric charges.
• Keep batteries out of reach of children and pets.
• Promptly repair or recycle batteries with damaged wraps.
• Do not crush, incinerate, or modify batteries.
• Use batteries only within manufacturer specifications.
• Recycle batteries properly—never toss them in general waste.