The global market for portable and household energy storage devices continues to expand in 2026. End-customers raise higher requirements for equipment housings in terms of protection level, heat dissipation, lightweight design and weather resistance. Aluminum housings and modified plastic shells with IP65/IP67 waterproof and dustproof, EMI shielding and integrated heat dissipation structures have become mainstream choices. Differentiated customized structural solutions help energy storage manufacturers reduce costs and accelerate product upgrading, bringing sustained growth to the precision metal and plastic customization industry.