· Product Size: 67 x 18 x 18 mm (2.64 x 0.7 x 0.7 inches), button top type 3.7v 18650 battery. Please carefully confirm the battery type before purchasing· Wide Compatibility: These 3.7v 18650 rechargeable batteries are perfect for a variety of devices, including LED flashlights, headlamps, toys, doorbells, cameras, mini fans, RC cars, headlights, and more· Long-lasting Power: 3200mAh high-capacity 18650 3.7v battery has a longer lifespan and is capable of storing more energy, which can extend the usage time of the devices, reduces the need for frequent charging and lowers the cost of long-term use. NOTE: Please fully charge the battery before first use· No Memory Effect: Enjoy the convenience of 3.7v rechargeable batteries that can be recharged many times without memory effect, whether they are fully or partially drained. Multiple protections make the products safe and reliable to be used· Customer Support: If you have any questions about these products, please do not hesitate to contact us. We are committed to providing prompt and helpful responses