DescriptionA 2S 21700 battery holder is designed to house two 21700 lithium-ion cells in series, providing 7.4V nominal output (8.4V when fully charged). These holders are commonly used in high-power applications like RC vehicles, power tools, custom battery packs, and portable electronics.Key Specifications1. Mechanical & CompatibilityCell Format: Holds two 21700 Li-ion cells (21mm × 70mm each).Material: Plastic (ABS/PC) – Lightweight, insulated.Dimensions:Length: ~140–150mm (two cells spacing).Width: ~25–30mm (depends on design).Height: ~20–25mm (varies by model)2. Common ApplicationsDIY power banks & solar projects.RC cars, drones, and hobby electronics.Custom electric bike/tool batteries.High-power flashlights & portable devices.