-100% Brand new! -18650 lithium cell cylindrical battery case holder batteries pack plastic holder bracket for DIY battery pack. -18650 cylindrical battery holder, fire retardant materials. Suitable for DIY combination of batteries. -With professional battery holder to replace the traditional general adhesive, which would brings firm connection and convenient maintenance. Its the best choice of the battery combination. -Crack resistant edge with slots, with the firm, It can accomodate various size. Freely combine batteries. -18650 battery spacer frame, can withstand high drop, high strength support, easy to heat dissipation. Single hole/2-linked/3-linked structure. -Vibration test can be conducted without attachment to any device.