Product description:
--Name: battery holder.
--Material: Plastic.
--Colour: Black.
--Number of cell: 1 , 2 , 3 , 4 , 6 , 8 , 10.
--Strong conductivity: 302 stainless steel spring.
--Easy to use: With switch, you can adjust it as needed.
--DC interface: more suitable, more convenient and faster.