Drone batteries: every gram is a trade-off
A drone carries its battery into the air, so weight, discharge current and runtime pull against each other in every design decision. This page explains that trade-off and how to choose within it.
Layered pack cross-section — the site's recurring diagram motif. It is a schematic, not a photograph of a product, factory or customer project, and it is not presented as a photograph of this company's factory.
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Weight is the drone buyer's first constraint, because every gram of battery is a gram less payload or a minute less flight. Li-polymer chemistry dominates drone packs for that reason: a flat pouch pack gives high energy for its weight and can be shaped to the airframe. The wearable Li-polymer pack on this site illustrates the format at small scale — 11.1V, 5600mAh, 288 g — but a drone pack must be chosen for its own airframe, and its weight budget follows from the drone's total lift, not from any example on this site.
Discharge current is the second constraint, and it is sharper for drones than for most devices. Take-off, climb and manoeuvre demand bursts far above cruise draw, and a pack that cannot deliver the burst will sag, cut out or overheat. The pack's maximum continuous discharge current, listed per model, must cover the worst burst the flight controller will demand, with margin. A pack chosen on capacity alone — the largest pack that fits — may still fail in the air if its discharge rating is too low for the motors.
Runtime is the third constraint, and it is where buyers most often overestimate. Flight time follows from usable energy divided by average power draw, and average draw in flight is higher than bench draw, because wind, manoeuvre and payload all add load. A buyer who sizes a drone pack from a bench test will be disappointed in the air. The honest method is to size from the drone's measured or specified average flight draw, allow a reserve for landing, and then check that the resulting pack fits the weight budget — if it does not, the drone, the payload or the flight plan must change, because no battery chemistry repeals the trade-off.
For a drone inquiry, state the drone type, its all-up weight, its motors' peak and average draw, its required flight time, its battery bay dimensions and its connector. Those facts determine the pack; a request for a drone battery without them is a request for a guess, and this site does not present guesses as recommendations.
How to choose in this family
Fix the chemistry first, then the voltage and series count, then the capacity. Check the exact model listing for its own dimensions, protection, certificate set, minimum order and lead time — those values belong to that listing and do not transfer to other models. If no listed size fits your enclosure, the custom route covers custom dimensions and configurations; describe the enclosure and the electrical requirements rather than asking for a general price.
Related pages
Li-polymer packs · Li-polymer pack example · Li-polymer selection · Chargers
How to place an inquiry, step by step
- Send the device facts. Tell us the device type, the available space (length, width and maximum thickness), the nominal voltage you need, the capacity or runtime you target, and the peak current if your device has motors, radios or heaters.
- Name the model or the chemistry. If a page on this site matches, quote its model description and listing details. If nothing matches, say so and describe the chemistry and voltage you need, so the conversation starts on the custom route.
- Confirm documents and terms in writing. Ask for the certificate set for that exact model, confirm the minimum order, the price basis and the lead time for that listing, and confirm payment and warranty terms before you pay. Terms stated for one model listing do not transfer to another model.
- Agree the sample step. Confirm whether the next step is a listed sample, an engineering sample for a custom design, or a small trial order, and what test you will run on arrival — fit in the enclosure, runtime, or peak-current behaviour.
Send all of this in one message through the contact page: device type, space, voltage, capacity, peak current, model description if you have one, and the documents you need. That is the whole inquiry — no separate form, no account, no extra step.
What to send us now
Send one message with your device type, the space the pack must fit, the voltage and capacity you need, the peak current if it matters, and the model description if a page on this site already matches. Add the documents you need — certificates are available upon request — and whether you need a listed model or a custom design. Use the contact page or write to [email protected], or call +86-755-25629920. A specific message like that is what turns a range of hundreds of models into a short, answerable question.