This flip-top 4-slot charger is professionally designed for 18650 lithium batteries and supports simultaneous charging of multiple batteries with high efficiency and stability. Built with an intelligent multi-protection system, it effectively prevents overcharging, overdischarging, short circuits and reverse insertion, providing all-round safety protection and ensuring stable and durable performance. Featuring an independent 4-slot charging design, it supports flexible charging for single or multiple batteries. It is widely compatible with devices equipped with 18650 batteries, such as flashlights, power banks, mini fans and smart home devices, serving as an essential practical charging accessory for home, outdoor and office use.