This product is battery holder for 3x 18650 / 3.7V rechargeable batteries. 18650 Batteries are very popular high capacity Li-Ion re-chargeable batteries. Takes 3 standard size 18650 batteries side by side to form a compact battery of 3.7Vx3 = 11.1V
Specification:
Battery Type: 3 pcs 18650
Small size, easy to carry
High-quality plastic holder
Embossed polarity marks
Dimensions: 7.70 cm x 6.10 cm x 2.10 cm (L x W x H)