Can you take power tool batteries on a plane? The short answer

Yes. In the US, you can take power tool batteries on a plane in your carry-on. Spare Li-ion batteries up to 100 Wh travel in the cabin, never in checked bags, while the tool itself goes in the hold.

Can you take power tool batteries on a plane? Yes, spare Li-ion power tool batteries within FAA limits belong in your carry-on, not checked luggage. This guide covers the rules, packing and storage.

Contents

1. Can you take power tool batteries on a plane? Airline rules
2. How to pack power tools and batteries for a flight
3. How to store power tool batteries before and after a trip
4. What M7 18V batteries do to protect themselves
5. FAQ
6. Conclusion

Can you take power tool batteries on a plane? Airline rules

Spare Li-ion batteries up to 100 Wh go in your carry-on, and damaged or recalled batteries cannot fly at all. These are FAA and TSA rules. Airlines can set stricter limits, so check with your carrier before you travel.

Important: This guide uses U.S. FAA rules as a practical reference. International requirements can vary by country, route and airline. IATA guidance provides a widely used safety baseline, but your operating airline’s policy and the rules at your departure, transit and destination airports always take priority. Check them before you travel.

Sources: FAA PackSafe (Lithium Batteries; Power Tools) and TSA “What Can I Bring?”. If a battery is rated above 100 Wh, ask your airline before you fly.

Can you take power tool batteries on a plane in checked luggage?

Not as spares. Under FAA rules, spare lithium-ion batteries must travel in carry-on baggage, and that applies to power tool packs and other spare lithium batteries alike. If your carry-on is taken from you at the gate, remove the spares first (see below).

How do you work out a battery’s watt-hours?

Multiply the battery’s rated voltage by its amp-hours (Ah); that is the formula the FAA gives. Many packs print the Wh figure on the label, and the label is the figure to go by.

• Example: the M7 DB-501 and DB-1850P are rated 18 V and 5.0 Ah, so 18 V × 5.0 Ah = 90 Wh, under the 100 Wh limit
• This is a calculated figure, not a catalogue rating; check the label on your own pack

What if your carry-on is checked at the gate?

Take the spare batteries out and keep them with you in the cabin. The FAA states that spare lithium batteries must stay with the passenger if the bag is gate-checked.

How to pack power tools and batteries for a flight

Take the battery off the tool, carry it in the cabin with its terminals protected, and check the tool switched off in its case. This follows the FAA’s recommended approach:

• Remove the battery from the tool before you pack
• Protect each spare battery: original packaging, tape over the terminals, or its own plastic bag or pouch
• Leave damaged, swollen or recalled batteries at home; the FAA does not allow them on board
• If a battery overheats, swells or smokes in flight, tell the crew immediately

Flying outside the US, or on a non-US airline, check that carrier’s rules too, as limits on quantity and Wh can be tighter.

How to store power tool batteries before and after a trip

Keep them at about half charge, somewhere cool and dry, and away from loose metal. Heat and a full charge are what age a stored Li-ion pack fastest. Battery University storage guidance

What charge level is best for storage?

Store packs at about 40–50% charge, the level Battery University recommends. A pack kept at 100% loses noticeably more capacity over the same period, and heat widens the gap.

What temperature should power tool batteries be stored at?

For long-term storage, when a pack will sit unused for weeks or months, Battery University gives 15°C (59°F) as the ideal temperature. Between jobs, a dry shop shelf or cabinet at room temperature is fine.

• Avoid heat: a closed truck cab or a tool box in the sun ages a pack far faster than a cool shelf
• A full charge combined with high temperature does the most damage, so avoid that pairing above all

Should you let batteries run completely flat before storing them?

No. Never store a Li-ion pack empty. Battery University warns that Li-ion cells should not sit below 2 V per cell for any length of time, as a deeply discharged cell may be unusable or unsafe to recharge.

• Charge to around half before a long layoff
• Check the charge every so often during long storage, and top up if it has dropped low

How do you protect battery terminals in storage?

Use the same protection you use for flying. Screws, bits and coins in the same drawer can bridge the contacts, so:

• Keep the battery on a tool or in a dedicated battery case
• Use the original packaging, or tape over exposed terminals
• Store each spare pack in its own bag or pouch

What M7 18V batteries do to protect themselves

M7 18V Li-ion packs have a built-in BMS and an LED fuel gauge, so you can check the charge before you pack or store them, and the pack guards itself against common faults. The protections listed in the M7 catalogue for the DB-501 and DB-1850P are:

• Low voltage, over current and over temperature protection
• Unbalance detection between cells
• Short circuit protection and low power consumption protection
• 1.2 m drop test passed

Protection circuits stop a pack from damaging itself in use. They do not replace terminal protection in your bag, and they cannot stop heat and a full charge from ageing a pack on the shelf. For heat and cut-outs during work, see our guide to power tool battery overheating.

FAQ

Can you take power tool batteries on a plane in checked luggage?

No. Under FAA rules, spare Li-ion batteries must go in your carry-on. Take the battery off the tool, carry it in the cabin and check the tool on its own.

How many power tool batteries can I take on a plane?

For spare Li-ion batteries rated at 100 Wh or less, the FAA does not set a general numerical limit when they are for personal use. However, this is a U.S. rule, not a worldwide guarantee. Airlines and local authorities may set stricter limits on quantity, watt-hours, packing or battery state of charge, so always check the operating airline’s policy before you travel. Batteries over 100 Wh and up to 160 Wh commonly require airline approval and may be limited to two spare batteries per person.

Are M7 18V 5.0 Ah batteries under the 100 Wh limit?

Yes. Using the FAA formula, a rated 18 V × 5.0 Ah works out at 90 Wh, under the 100 Wh limit. Always confirm against the rating printed on your battery and your airline’s rules.

Can I leave power tool batteries on the charger?

Not for long-term storage. According to Battery University, a Li-ion pack kept fully charged loses capacity faster than one kept at around 40–50%. If a pack will sit unused for a while, take it off the charger and store it part-charged.

Is it OK to store power tool batteries in a cold garage?

Cool is better than warm for a stored pack. Battery University gives 15°C (59°F) as the ideal for long-term storage, and a part-charged pack loses very little capacity in cool conditions.

Conclusion

Battery in the cabin, tool in the hold, terminals covered; back at the shop, half charge on a cool shelf.

Before you fly, ask: can you take power tool batteries on a plane under your airline’s policy for that route? Check the current rules before you pack.

Further reading

• Power Tool Battery Overheating and Battery Cutting Off: Guide to Li-ion Battery Longevity
• How to Choose the Right Power Tool Battery: 12V vs 18V
• The Best 18V Charger Guide
• Why Your Cordless Impact Wrench Loses Power Under Load

References

• FAA PackSafe: Lithium Batteries
• FAA PackSafe: Power Tools
• TSA: Power Tools
• Battery University BU-702: How to Store Batteries

Contact us, or talk to your local distributor