Round LiPo batteries: circular cells for round housings
Eleven round models for devices whose battery cavity is circular — compact wearables, headsets, smart watches and small consumer devices. Round is a shape decision, not a capacity class.
Dimension-callout pouch outline — the site's recurring diagram motif. It is a schematic, not a photograph of a product, factory or customer project.
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A round pouch cell solves a packaging problem that a rectangular cell cannot: a circular cavity wastes space around a rectangle and can leave a rectangular cell unsupported at the corners. The round format lets the cell fill the cavity and sit evenly against the enclosure. The cost is that capacity is bounded by the circle's diameter and the thickness the device allows, so a round-cell inquiry should always state both dimensions, not just the diameter.
Listed applications for round models include Bluetooth headsets, smart watches, power tools, consumer electronics and toys. Individual listings differ in capacity — examples in the family range from tens to hundreds of milliamp-hours — and in minimum order and terms, so compare listings rather than assuming a family standard.
Round cells also appear in wearable designs alongside curved cells. The choice between round and curved is a cavity question: if the device is a disc, round fits; if the device curves around a wrist, a curved cell follows the band. Send the cavity shape with your inquiry and the choice usually answers itself.
How to choose in this family
Fix the shape first, then the voltage and series count, then the capacity. Check the exact model listing for its own minimum order, enquiry price range, lead time and certificate set — 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 shapes; describe the enclosure rather than asking for a general price.
Related pages
LiPo batteries · Curved LiPo · Wearable devices · Shape selection
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 shape. If a page on this site matches, quote its model number and listing details. If nothing matches, say so and describe the shape — flat, round, curved or ultra-thin — 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 listed enquiry price range 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 shape, 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 number if you have one, and the documents you need. That is the whole inquiry — one message, no account, no extra step.
What to send us now
Send one message with your device type, the space the battery must fit, the voltage and capacity you need, the peak current if it matters, and the model number if a page on this site already matches. Add the documents you need — certificates available upon request — and whether you need a listed model or a custom shape. Use the contact page and address it to the sales team by first name as published there. A specific message like that is what turns a catalogue of hundreds of models into a short, answerable question.