21700 Cell Spacer 30Pcs 1X4 Cell Battery Stand Battery Plastic Holder Bracket

Secure Fit for 21700 Battery Spacer: An 21.3 mm / 0.84 inch diameter hole precisely holds each lithium battery, preventing shifting during assembly. This brings a stable and reliable experience to DIY enthusiasts building custom battery packs.Modular Edge Slots for Strong Connection: With a 24.2 mm / 0.95 inch total width per unit, the edge slots enable a firm link between cylindrical cell brackets, eliminating structural separation. Users can freely build a solid battery holder layouts for their tools.Effective Heat Dissipation Design: The open spacer structure creates air gaps between batteries, eliminating the heat buildup issue. This improves performance for battery spacer users working on high-drain projects like drones or power tools.Durable Plastic Material: Made from impact-resistant plastic, this battery holder withstands repeated assembly without cracking. It boasts stamping resistance, heat resistance, low-temperature resistance and chemical corrosion resistance with stable performance under complex working conditions. It provides long-term durability for hobbyists building reliable energy storage systems.Flexible 1x4 Cell Bracket Unit: The 8 mm / 0.31 inch thick single unit allows for freely taking apart and rearranging. This offers unlimited customization to DIY makers, ensuring their battery holder configuration matches any project requirement.