1. Model: 18650 2. Color: Black 3. Material: ABS 4. Arrangement: can be parallel or series 5. Small size, easy to carry 6. 1x 18650 battery holder: about 7.6x2cm 7. 2x 18650 battery holder: about 7.6x3.9cm 8. 3x 18650 battery holder: about 7.6x5.9cm 9. 4x 18650 battery holder: about 7.6x7.9cm 10. The battery holder is one or more compartments or compartments for containing batteries. For dry batteries, the holder must also make electrical contact with the battery terminals. For wet batteries, the cable is usually connected to the battery terminals, as seen in automobiles or emergency lighting equipment. If the battery is expected to continue to be used throughout the life of the product, there is no need to use a holder, and the tabs soldered to the battery terminals can be directly soldered to the printed circuit board. A good choice for you! feature: 11. Note: Due to different displays and different lighting, the picture may not show the actual color of the item. Thanks for your understanding
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