This is a 4 cell surface mount battery holder for 3.7V 18650 batteries.
Specifications:
Item: Surface Mount Device 18650 Battery Holder
Support Model: 18650 Batteries
Shell material: ABS fire, flame retardant, high temperature, color diversity and other materials for choice.
Metal spring: carbon steel nickel plating by NCAA salt spray test, stainless steel spring.
Terminal: copper nickel plating
Dimensions: 77.1 x 75 x 14.9 mm L x W x H