we are professional battery manufacturer in heated clothing industry over 10 years. we make all kinds of li ion battery packs for heated jacket, wlectric jacket, heated sweatshirt, heated motorcycle gear, heated boots, heated shirt, heated slippers, electric heated jacket, heated pants, battery heated jacket, heated glove liners, heated ski gloves, heated coat womens, heated vest womens, heated underwear, electric clothing, heated motorcycle jacket, heated gloves and socks, heated hunting jacket, electrician pants, heated hat, battery operated gloves.
we offer the most extensive models for heating clothing industry, our heating clothing batteries range from 3.7v to 14.8v most popular models, capacity from 1800mah to 10000mah, with LED light and switches to display remaining power level and set output levels. OEM/ODM accepted and we are specilisted in design these batteries, providing industry design, pcb design, tooling design, moulding service, prototyping, and flexiable small quantity manufacturing.
Heated Clothing Battery,Heated Jacket Battery,Heated Gloves Battery,Heated Vest Battery Asarke Industry Co., Limited , https://www.asarke-industry.com
GravityLight is a solar LED light. The design team hopes to use a different kind of free energy to generate electricity, which is the gravity of the Earth. Users only need to bring up a 9 kg bag with GravityLight to generate enough energy for 30 minutes of lighting. This LED light does not require a rechargeable battery or energy source at all.
GravityLight is designed to charge other devices such as radios and Rechargeable Batteries. These devices can be connected to an interface on the GravityLight front panel. The brightness of GravityLight can be adjusted according to the needs of the user or to extend the lighting time.
GravityLight's team hopes to reduce the price of the product to less than $5, which will attract people in poor areas to abandon kerosene lamps and switch to the new lighting tools. 
New LED light GravityLight helps poor areas solve lighting problems
Although computers, televisions, and a wide variety of modern home appliances and digital products have been used in developed regions, there are still 1.5 billion people in the less developed regions of the world who need to use kerosene lighting. A product called GravityLight wants to help people in these areas solve this problem.