About this item Stay powered up wherever you go with our Universal Mobile Cell Phone Battery Charger. Designed to work with a wide range of smartphone batteries, this versatile charger is the perfect backup charging solution for people on the move, technicians, or anyone who needs to charge loose batteries without a phone. Key Features: �� Universal Compatibility: Compatible with most Li-ion mobile phone batteries (3.7V–4.2V). Adjustable pins fit various battery sizes and terminals. ⚡ Smart Charging Technology: Automatically detects battery polarity and adjusts charging current for safe and efficient charging. �� USB Output Port: Can also charge other USB-powered devices such as smartphones, MP3 players, and more. �� LED Indicator: Clear LED lights show charging status – red for charging, blue for fully charged. ��️ Built-in Safety Protections: Overcharge, overcurrent, short circuit, and reverse polarity protection ensure safe operation. �� Compact & Travel-Friendly: Lightweight design makes it easy to carry in your bag or pocket. any help: [email protected]