Adventure ready protection: The strength shell provides impact resistance to safeguard internal components during travel and on the go use. This case is compatible with a variety of devices. Easy maintenance and upgrades: For enthusiasts, the battery case offers easy disassembly and installation, enabling quick battery replacement and maintenance of internal components. Power management with the 16x18650 Battery Case: Batteries not included, this unit features charging capabilities for energy replenishment. Practical use scenarios Outdoor travel and field work: Use the rugged shell to protect devices while on hikes, camping trips, or commutes, with onboard charging capability to extend usage. This case can be paired with different devices and cells can be swapped as needed for maintenance and power solution adaptation. Remote work and service calls: Maintain uptime in the field by quickly replacing batteries and keeping devices powered during long hours away from outlets.