The Golisi Needle 2 is a compact and efficient dual-slot charger designed for cylindrical rechargeable batteries ranging from 32mm to 70mm in length.Powered via a USB port, it delivers a 0.5A charging current per slot, allowing for simultaneous charging of two batteries.The charger features LED indicators for real-time charging status and incorporates multiple safety protections, including short circuit, over-current, and reverse polarity safeguards.Its durable ABS/PC fireproof casing and military-grade loading springs ensure longevity, making it an ideal choice for both home and travel use.