Products & Care
Battery care and travel tips for MAGFAST power products
MAGFAST power banks use lithium-ion batteries, the type found in nearly every mainstream battery pack because they store a lot of charge in a small, light space. A few simple habits help them last longer.
Five things that affect battery life
Temperature. Lithium-ion batteries prefer to stay cool. Heat above about 86°F (30°C) can shorten battery life sharply, so avoid leaving products in direct sun or in a hot car.
Storage charge. Store batteries with a partial charge, around 40 to 50%, rather than full. Always keep some charge in them, because a battery left completely empty for a long time can become unsafe to recharge.
Charging speed. Gentle charging is kinder to a battery than fast charging. Use fast charging when you're in a hurry, and slower charging when you aren't.
Charging cycles. Every charge-and-discharge cycle very slightly reduces capacity. Recharging when the battery is partly used, around the halfway mark, is gentler than draining it completely each time.
Age. Batteries slowly age even when unused. One good power bank usually serves you better than several older ones.
Travel and flying
Rules for lithium power banks tightened sharply in 2026 and are still changing airline by airline, so it's worth a quick check before you fly.
Carry-on only. Power banks and spare lithium batteries belong in your carry-on bag, never in checked luggage. If your carry-on is gate-checked, take the power bank out first and keep it with you.
Keep it on you, not in the overhead bin. Since spring 2026, United, American, Southwest and many international airlines no longer allow power banks in overhead bins. Keep yours on you, in the seat pocket, or in a bag under the seat in front of you, where the crew can reach it.
Don't recharge it in flight. Airlines don't allow you to recharge the power bank itself from the seat's USB or power outlet. Most still let you use it to charge your phone, though some international airlines restrict that too.
Capacity limits. Power banks up to 100 Wh can travel in your carry-on without airline approval. Larger ones, from 101 to 160 Wh, need airline approval, and anything above 160 Wh isn't allowed. There's no such thing as an "airline-approved" power bank. What matters is the capacity in watt-hours (Wh) printed on the product, and your airline's rules. MAGFAST Passport is about 20 Wh, well under the limit.
How many you can bring varies. Each airline sets its own limit, and the limits keep changing, so check your airline's own page before you fly rather than relying on one number. The FAA PackSafe page is the best general guide.
Wall chargers have no battery, so none of these rules apply to them. That includes Powerbrick Pro 140 and the rest of the Powerbrick family.
Something doesn't seem right?
If a battery swells, gets unusually hot, or smells odd, stop using it, unplug it, and move it away from anything flammable. Then write to Hello@MAGFAST.com.
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