hand warmer power banks 5200mAh Mini Rechargeable heat packs USB Phone Charger Heater Pocket Cartoon Electric Winter Heating

hand warmer power bank 5200mAh Mini Rechargeable heat packs USB Phone Heater Pocket Cartoon Electric Winter Heating Case

Power on: lightly press the switch to activate and display the blue light when the battery is charged, and the blue light is displayed when charging the mobile phone
Heating: Press and hold for 3 seconds to activate the red light, the temperature will increase after about 30 seconds, press to adjust the temperature
- 1st gear for red light around 45° / 2nd gear for red light around 50° / 3rd gear for red light at 55°
Power off: press and hold for 3 seconds to power off
When charging the phone: a blue light is displayed
When the product is charging: blue light is displayed and flashes

5200/4000/2400mAh Rechargeable Hand Warmer Adjustable Heat - Design with 3 temperature modes [104~113℉ (40~45℃)], [113~122℉ (45~50℃)], 122~131℉ (50~55℃)],

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 Power bank 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 3-6 hours.fast heating up in 3 seconds 40°,50°,55°

3. 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 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.

NOTE:

Portable Battery 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!