When evaluating a Mini Light Fan, focus on battery capacity (mAh), motor type, and LED brightness (lumens). For B2B buyers, a battery capacity of 2000mAh to 4000mAh is ideal for balancing weight and runtime (typically 4-10 hours). Prioritize Brushless DC (BLDC) motors as they offer higher energy efficiency, lower noise levels (under 30dB), and a longer lifespan compared to brushed motors. For the lighting component, ensure the LEDs offer adjustable brightness levels and a color temperature suitable for the intended use, such as 3000K (warm) for camping or 5000K (daylight) for workspaces.