
Overview
Choose a single-cell replacement battery for a compatible RC helicopter, quadcopter or model airplane. Select the model code and capacity first, then match the connector and wire polarity to the original pack.
Features
- The flat lithium-polymer pouch fits compact battery bays. Packs with the same capacity can have different dimensions.
- The source rates the series at 25C discharge. A two-wire lead connects the pack to the aircraft or a compatible single-cell charger.
- Models from 802030 onward are listed with a protection board for overcharge, overvoltage, overcurrent and short circuits. The individual 702025 and 702030 listings do not confirm a board.
Specifications
- Cell configuration: 1S rechargeable lithium-polymer pouch, lithium cobalt oxide cathode
- Nominal voltage: 3.7 V
- Discharge rating: 25C
- Listed discharge temperature: −10 to 60 °C
- Connector choices: white inline 2-pin, JST, SM, PH 2.0 or XH 2.54. The 1.25 mm custom connector mentioned in the source is outside the standard range.
Model dimensions
Dimensions are hand-measured. For the 802555 1000 mAh pack, the model image gives 55 mm length and the overview table gives 65 mm. Confirm the actual length before ordering for a close-fitting bay.
| Model | Capacity | Length × width × thickness (mm) |
|---|---|---|
| 702025 | 220 mAh | 27 × 20 × 7.5 |
| 702030 | 300 mAh | 32 × 20 × 7.5 |
| 802030 | 300 mAh | 33 × 20 × 7.8 |
| 702035 | 380 mAh | 37 × 20 × 7.5 |
| 702035 | 400 mAh | 37 × 20 × 7.8 |
| 802035 | 400 mAh | 37 × 20 × 8 |
| 902035 | 450 mAh | 37 × 20 × 8.5 |
| 721855 | 500 mAh | 57 × 18 × 7.8 |
| 902240 | 550 mAh | 40 × 22 × 9 |
| 752540 | 550 mAh | 43 × 25 × 7.5 |
| 802540 | 600 mAh | 43 × 25 × 8 |
| 852540 | 650 mAh | 43 × 25 × 8.5 |
| 902540 | 800 mAh | 43 × 25 × 9 |
| 703048 | 850 mAh | 51 × 30 × 7.5 |
| 752560 | 900 mAh | 62 × 25 × 7.5 |
| 802555 | 1000 mAh | 55 or 65 × 25 × 8 |
| 903048 | 1100 mAh | 51 × 30 × 9 |
| 903052 | 1200 mAh | 53 × 30 × 9 |
| 903465 | 1800 mAh | 65 × 34 × 8.5 |
| 903465 | 2000 mAh | 65 × 34 × 8.6 |
What's Included
One 3.7 V battery in the selected model, capacity and connector configuration. Charging accessories pictured below illustrate the supplier's quantity-dependent offer. Accessory availability must be confirmed separately.
Applications
For RC aircraft designed for a 3.7 V single-cell pack. Compare the original pack, battery bay, connector and pin polarity before choosing a replacement. Browse other 1S batteries for your aircraft.
FAQ
How can I check the connector?
Compare the front and back views below with the original plug. With the metal contacts facing up, verify that the marked red-wire position and the black wire both match.
Which USB supply does the illustrated charger use?
The source lists 5 V, 0.5–2 A input for the USB charging lead and 5 V, 2 A for the multi-port charger. Use a compatible 1S charger between the USB supply and battery. Supervise charging.
Visual Details














