GBSELL Portable Power Bank 18650 External Backup Battery Charger With Key Chain Green Compatible with: USB charging mobile phones and electronic devices. New rechargeable battery, no memory, more than 500 circle time. Built with IC chip to protect your devices from short circuit, overcharge. Equip with strap, easy to carry. Note: please leave us a note on paypal to specify color when you make payment, otherwise we will send random color to you.