Solar Power Bank 20000mAh Portable Charging Poverbank camping LED lights External Battery Charger for All Smartphone solar panel

Product name:  Solar Power Bank 

battery capacity:20000mAh
Material: ABS +TPU+Silicone
 

Product characteristics]: Waterproof, dustproof, drop-proof three-proof function, strong light camping light magnetic disassembly [Micro-USB input] DC5V/2.4A 9V/2.0A
【Type-C input】: DC5V/2.4A 9V/2A
【Type-C Output】: DC5V/3A 9V/2A 12/1.5A
【USB1 Output】: DC5V/3A 9V/2A 12V/1.5A
【USB2 Output】: DC5V/3A
【Camping Lights Digital】: 3W
[Solar board output]: 300mA/H (4 pieces of solar panels)
【Rizhao intensity】: ≥2500LUX
Battery type: High molecular lithium battery
[Charging time]: about 10 hours@5V/2.4A charger
  [Actual capacity]: 20000mAh (bid 20000 mAh)
  【Material】: Plastic ABS+PC Fire Fire material+silicone
[Product Size]: 173*92*43mm (folding size) 340*160*31mm (expanded size)
【Weight】: 597.9g

Package Included:

1x Power Bank

1x Charger Cable

1x User Manual

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!