CPAP Battery
A spare CPAP battery is a lithium battery and follows the standard carry-on-only, watt-hour-limited rule.
Carry-on
Allowed with conditions
Checked
Not allowed
Carry-on details
Allowed with conditions. A spare CPAP battery pack is a lithium battery and follows the same tiered rule as any other: up to 100 Wh is unrestricted, 100–160 Wh needs airline approval, over 160 Wh is banned. Most CPAP travel batteries fall under 100 Wh, but check the rating printed on the pack.
Checked-bag details
Not allowed. Like any spare lithium battery, it can't travel in checked baggage — it must stay with you in the cabin.
Quantity limit
100 wh (per item)
Special instructions
The CPAP machine itself is a medical device and doesn't count against your carry-on allowance on most airlines — see the CPAP machine entry. This entry covers the spare/backup battery pack specifically.
Related rules
FAQ
- Can I pack a spare CPAP battery in checked luggage since the machine can go there?
- No. The battery is a spare lithium battery and must stay in carry-on regardless of where the CPAP machine itself is packed.
Related items
Source: FAA — PackSafe (Hazardous Materials) · Last verified: 2026-08-02
Final decision rests with the security officer at the checkpoint.