External battery case For Samsung Galaxy S9 Plus power bank charging Cover
Smart External battery case For Samsung Galaxy S9 Plus portable Portable power bank external battery charging Cover Box Specification: -Item Type: Phone case+Magnetic Charger Power Bank 5000mAh Battery capacity: 5000mAh Available capacity: 3500-4000mAh Charging conversion rate: 70%-80% NOTE: Portable Battery charger case has two regular standard of capacity , one is the battery capacity, one is the rated capacity. Why exist this difference? The most important reason is the conversion rate. Because most of power bank's battery voltage is 3.7V, and power bank needs to increase the voltage to 5V when charging the mobile phone, which making the power bank's conversion efficiency only 3.75/5=74%, Also include generated heat when battery voltage boosting, and various of wire consumption, Electricity and self-consumption. these points add up to account for 30%-40% of the power of the mobile power source. So the 5,000mAh power bank can really be used by us only about 3000-4000mAh. Also, The conversion rate of the entire mobile power industry is basically in the range of 60%-70%. Please kindly noted. Please search on Google if want to know the details!
Specifications
| Return Shipping Will Be Paid By | Buyer |
| All Returns Accepted | Returns Accepted |
| Item Must Be Returned Within | 30 Days |
| Brand | Unbranded |
| Type | Battery Case |
| Character | battery charger box |
| Manufacturer Warranty | 3 Months |
| Items Included | Batteryt CASE |
| Design/Finish | Slim |
| Theme | powerbank case |
| Features | Anti-Scratch |
| Material | Plastic |
| Country/Region Of Manufacture | China |
| Capacity | 5000mAh |
What unbranded case is the soft matte texture that feels great to hold all day.
