"No need to hurry to the nearest outlet when you have the Dark Energy Poseidon Nano PowerBank with you! This 3,000mAh rechargeable battery provides approximately 5 to 8 hours of additional battery power for most smartphones, and it can hold a charge for 2+ years. In addition, you can charge smaller devices multiple times or get a partial charge on larger ones. The Poseidon Nano boasts multiple charging methods, including MagSafe, Mavrik wireless charging, and USB-C cable charging. It's about 40% smaller than the average smartphone, so you can easily tuck it into a pocket, purse, or backpack for power in a pinch. Durable construction is IP67-rated for water resistance and tested to survive 6 weeks in freezing temperatures. This portable charger includes a 3' USB-C to USB-C cable. 4""L x 2.68""W x .47""H. Weight: 3.8 oz. Mfrs. limited 2-year warranty.Manufacturer model #: PN30GYBR. 3,000mAh internal battery can hold a charge for 2+ years Provides approximately 8 to 10 hours of additional battery power for most smartphones Compatible with a wide variety of electronic devices 3 different methods of recharging MagSafe, Mavrik Tech wireless charging, and USB-C About 40% smaller than the average smartphone for portability IP67 water-resistant rated Tested to survive 6 weeks in freezing temperatures Includes 3' USB-C to USB-C cable"