Here's a practical checklist to run through when evaluating a vape for your inventory. This isn't exhaustive, but it covers the big ones.

• Battery capacity (mAh): Make sure it matches the stated puff count. A higher mAh generally means more puffs, but only if the coil is efficient.
• Coil resistance (ohms): Lower resistance (sub-ohm) means more vapor and stronger throat hit. Higher resistance (1 ohm and above) is typically used for lower power and less vapor.
• Nicotine strength (mg/mL or %): Verify it's within legal limits for your market. Some countries cap nicotine at 20 mg/mL (2%).
• E-liquid volume (mL): Check that the stated volume matches the actual capacity. This affects how many puffs you get and how it's taxed.
• Child-resistant packaging: Many jurisdictions require this for nicotine-containing products. Check for certification or features like a two-step opening mechanism.
• Regulatory approvals: Look for CE, RoHS, or other relevant certifications depending on your region.