- High Energy Density: Packs 1000mAh of capacity into a slim 8mm profile.
- Built-in Safety PCM: Integrated protection board prevents battery swelling and fire hazards by managing voltage thresholds.
- Low Self-Discharge: Retains over 80% of its charge even after months of storage, ensuring devices are ready when needed.
- Broad Compatibility: Fits a wide range of devices including smart translators, portable speakers, and automotive electronics.
- Flexible Leads: Comes with pre-soldered positive (red) and negative (black) wires for easy installation or connector crimping.
1000mAh 802540 3.7v polymer lithium battery 852540 scanning meter voice box driving instrument
| Model | 802540 / 852540 |
|---|---|
| Nominal Voltage | 3.7V |
| Charging Voltage | 4.2V (Max) |
| Capacity | 1000mAh (3.7Wh) |
| Dimensions | Thickness: 8mm |
| Discharge Cut-off | 2.75V – 3.0V |
| Operating Temp | Discharge: -20°C to 60°C |
| Cycle Life | >500 cycles (to 80% capacity) |



- Verification: Confirm the dimensions (8x25x40mm) fit your device’s battery compartment before installation.
- Polarity Check: Ensure the Red (Positive) and Black (Negative) wires match your device’s motherboard terminals. Swapping polarity can cause permanent damage.
- Initial Charge: Upon installation, charge the battery to 100% using a standard 5V USB charger or the device’s internal charging circuit.
- Storage: If the device will not be used for more than 30 days, store the battery at approximately 50% charge (3.8V–3.85V) in a cool, dry place.
Yes. The “802540” indicates 8mm thickness, while “852540” indicates 8.5mm. These are generally interchangeable as long as the 0.5mm difference fits within your device’s housing.
Yes, it is designed for high-temperature stability. However, avoid leaving the device in direct, extreme 2026 summer sunlight for extended periods to maximize battery longevity.
Standard units come with tinned bare leads. For business or bulk purchasing, custom connectors (such as JST-PH 2.0 or ZH 1.5) can often be pre-installed upon request.
Lithium polymer batteries are “soft-pack” cells. A slight softness is normal, but if the battery is significantly swollen like a pillow, do not use it; this indicates a gas release from a fault or over-discharge.
Yes. Business buyers can find competitive tiered pricing on Alibaba or AliExpress for large-scale procurement.









