When evaluating LED shoes, the battery type and capacity are paramount; look for rechargeable lithium batteries (typically 3.7V) with a capacity of at least 450mAh to ensure 6-8 hours of illumination. The LED strip quality should be high-density to avoid 'dark spots,' and the charging port (usually Micro-USB or USB-C) must be reinforced to prevent detachment during active play. Additionally, the sole material should be TPR or EVA for a balance of flexibility, slip resistance, and the ability to house the electronics securely.