Batteries decide how much you fly, how long the drone lasts and how safe the hobby is. They are also the part buyers think about least before purchase. This guide explains what to look for in drone batteries and chargers, how many to buy, and how to charge, store and recycle them.
Key takeaways
- Buy batteries made for your drone from a trustworthy source.
- Charge on a hard, non-flammable surface and never leave batteries charging unattended.
- Swollen or damaged batteries should be retired and recycled, never flown.
Smart batteries vs basic packs
Most camera drones use smart batteries with built-in electronics that report charge level, cycle count and health, and protect against overcharging. Many also discharge themselves to a storage level after a few days. FPV drones usually use basic lithium polymer packs that need a balance charger and more care from the pilot.
How many batteries to buy
One battery means one short flight. Many owners find two or three batteries enough for a satisfying session. Heavy users and people flying for work often carry more. Consider the time to recharge between flights when planning a day out.
Chargers and hubs
Use the charger designed for the battery. For smart batteries, that is usually the manufacturer’s charger or hub. For FPV packs, use a balance charger set to the correct chemistry and cell count. A hub that charges batteries in sequence saves effort; some also charge from a car or power bank.
Charging safely
- Charge on a hard, non-flammable surface, away from anything that burns.
- Stay nearby while charging, and never charge overnight.
- Let hot batteries cool before charging.
- Stop if a battery gets unusually hot, smells or swells.
- Keep batteries away from children and pets while charging.
Storing batteries
Store batteries at a partial charge if they will not be used for a while, in a cool, dry place away from direct sun. Many smart batteries handle this automatically. Fire-resistant storage bags or boxes give extra protection. Do not leave batteries in a hot car.
Battery types at a glance
| Smart battery | Basic LiPo pack | |
|---|---|---|
| Common on | Camera drones | FPV drones |
| Charge monitoring | Built in | Charger and pilot |
| Storage mode | Often automatic | Manual |
| Care needed | Moderate | High |
Signs a battery should be retired
Retire a battery if it is swollen, cracked, dented, leaking or smells unusual, if it gets very hot in normal use, or if flight time has dropped sharply. A swollen battery is a clear stop sign: do not charge it, do not fly it and do not take it on a plane.
Recycling
Lithium batteries should not go in household trash or curbside recycling bins, where they can cause fires. The US Environmental Protection Agency recommends taking them to a battery recycling drop-off or household hazardous waste collection. Many electronics retailers accept them.
Tip: Label each battery with a number and keep a simple note of when you bought it. When a problem appears, you know which battery it is and how old it is.
Which setup fits
Casual flyers usually do well with two or three smart batteries and the standard charger. Travelers benefit from a hub that charges from USB. FPV pilots need a quality balance charger, several packs and a safe charging place. See Flying With Drone Batteries: Watt-Hours, Carry-On Rules and Packing before any trip by air.
Cold and hot weather
Lithium batteries deliver less power when cold, so winter flights are shorter and the battery can drop faster than the display suggests. Keep batteries warm in an inside pocket until use and land with a larger reserve. In heat, avoid charging batteries straight after a flight or leaving them in direct sun. Some smart batteries refuse to charge when too hot or too cold, which is a safety feature rather than a fault.
Buying from a trustworthy source
Counterfeit and poorly made lithium batteries are a real risk: they may lack proper protection circuits and can overheat. Buy batteries from the drone’s manufacturer or authorized sellers, and be wary of prices that look far below the norm. Check that the model number matches your drone exactly.
Common mistakes
- Buying unknown third-party batteries.
- Charging overnight or unattended.
- Storing batteries full for months.
- Flying on a swollen battery.
Frequently asked questions
How long do drone batteries last?
It depends on use and care. Health usually declines with charge cycles and age.
Can I leave batteries charging overnight?
It is not recommended. Charge while you are nearby.
How do I dispose of a drone battery?
Take it to a battery recycling drop-off or household hazardous waste collection, as the EPA recommends.
For more gear, see Drone Accessories Worth Buying (and Ones You Can Skip).