Safety is the top priority for lithium power banks. Reliable products are equipped with multi-protection smart circuits controlled by BMS chips. Standard protections include overcharge protection, over-discharge protection, over-current protection, over-voltage protection, short-circuit protection and temperature control. Once abnormal status is detected, the chip cuts off power automatically to avoid risks. Trustworthy power banks carry certifications such as CE, FCC, UN38.3 and IEC62133. These certificates prove they pass strict lab tests for transportation and daily use. Avoid cheap unbranded power banks with thin casings and unknown cells. They may overheat, swell or even cause hazards. For bulk orders, always ask suppliers for test reports and sample testing before mass production.