If you import power banks for retail, gift shops or distribution, this wholesale guide helps you avoid common pitfalls. First, confirm real capacity instead of only reading marked mAh. Ask suppliers for capacity test reports. Second, check all required certifications for your target market: CE, FCC, UN38.3 and local safety standards. Discuss MOQ, sample policy, lead time and logo customization in advance. Request samples to test charging speed, heat performance, port stability and shell quality. Pay attention to after-sales terms. Battery products usually have a limited warranty period. Clarify defective rate support before placing large orders. Stable quality, transparent specs and complete documents are the foundation of long-term cooperation with power bank manufacturers.