1000mAh 802540 3.7v polymer lithium battery 852540 scanning meter voice box driving instrument

SKU: FA1064
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)

High-energy-density lithium polymer (LiPo) batteries are the standard for powering portable smart devices. The 1000mAh 802540 3.7V Polymer Lithium Battery is a specialized power solution designed for thin-profile electronics requiring stable, long-lasting energy in a compact footprint.
Long Product Description
The 802540 (also compatible with 852540 specifications) is a high-performance lithium polymer battery engineered for the next generation of portable electronics. With a capacity of 1000mAh, it provides an ideal balance between weight and run-time, making it the primary choice for devices like scanning pens, Bluetooth voice boxes, dash cams (driving instruments), and handheld GPS units.
The battery features an integrated Intelligent Protection Circuit Module (PCM), which provides critical safety layers against overcharging, over-discharging, and short-circuiting. Its “pouch cell” design allows for superior heat dissipation and a lightweight form factor that fits into tight internal compartments where traditional cylindrical batteries cannot. Whether for individual DIY repairs or high-volume business manufacturing, this battery offers consistent discharge rates and a long cycle life.
Key Features
  • 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.
Usage Instructions
  1. Verification: Confirm the dimensions (8x25x40mm) fit your device’s battery compartment before installation.
  2. Polarity Check: Ensure the Red (Positive) and Black (Negative) wires match your device’s motherboard terminals. Swapping polarity can cause permanent damage.
  3. Initial Charge: Upon installation, charge the battery to 100% using a standard 5V USB charger or the device’s internal charging circuit.
  4. 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.
Q: Can I use this battery if my original battery was an 852540?

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.

Q: Is this battery safe for use in a car dash cam (driving instrument)?

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.

Q: Does the battery come with a connector?

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.

Q: Why does my new battery look slightly "puffy" or soft?

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.

Q: Can I buy these in bulk for my repair business?

Yes. Business buyers can find competitive tiered pricing on Alibaba or AliExpress for large-scale procurement.