10000mAh portable Power Bank Hand Warmers outdoor camping Hand Heater USB Long Lasting Heating Vibration massage LED flashlight

10000mAh portable Power Bank Hand Warmers outdoor camping Hand Heater USB Long Lasting Heating Vibration massage LED flashlight

(double-sided heating)

10000mAh Rechargeable Hand Warmer Adjustable Heat – Design with 3 temperature modes [104~113℉ (40~45℃)], [113~122℉ (45~50℃)], 122~131℉ (50~55℃)], constant heat. 

Warm up Fast – Rapidly warm up double sides in 3 seconds, press the switch and instantly release the warmth for you. Double-sided and consistent warmth, heating up in 3 seconds, each full charge heating up to 4-8 hours, charging time is 2-3 hours. 
Reusable hand warmer built-in 10000mAh rechargeable

1.double-sided heating, you can choose the best temperature according to your needs, even in the cold days can also make your hands stay warm.

2. USB charging is fast and convenient, when the power runs out, just plug in the USB cable,the heating body using ceramic heat dissipation technology, heat retention time can last about 4-12 hours.fast heating up in 3 seconds 40°,50°,60°

3. 10000mAh 2-in-1 hand warmer, can be carried in one hand, or in a pocket, can be used to warm hands, feet, knees, belly. You can carry it with you during sports, fishing, hiking, camping, skiing, traveling or outdoor sports.

4. High-quality & Safety : This hand warmers Made of High-quality ABS and aluminum alloy materials,ertificated with UL,WEEE,CE,PSE,FCC,ROHS and quality inspection.No need to fill water, safe and explosion-proof, automatic power-off protection, intelligent temperature control system to prevent overheat.

5. It is the perfect gift for family and friends to spend a cold winter. With vibration massage function

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!