Dongguan Large Electronic Co., Ltd. was established in 2002 and is headquartered in Gaosheng Science & Technology Park, Nancheng District, Dongguan City, Guangdong Province, China. The company’s technology center includes professional technical categories such as industrial design, electronics, power, software, structure, technology, measurement and control, electrochemistry, opto-electromechanical, signal processing, and instrumentation. The technical team now has more than 60 people, including 7 professors and experts, and associate professor 1 expert, 12 senior engineer titles. The company’s test center includes safety laboratories, environmental laboratories, environmental protection laboratories, power supply laboratories, electrical performance laboratories, and photovoltaic energy storage laboratories. It can independently complete the full project test certification of raw/auxiliary materials, spare parts, and battery modules.
Based on advanced lithium battery application technology, relying on South China University of Technology, Central South University, Dongguan University of Technology, National Chemical Power Quality Inspection Center and other partners, the high-tech battery producer has introduced the cultivation and joint development of independent core technology of the enterprise, and has established the core scientific research capabilities of customized lithium battery services.
The company’s existing lithium battery customized solutions and products are widely used in aerospace, satellite navigation, high-energy physics, railway infrastructure, public safety, power communications, medical electronics, commercial finance, security communications, etc. The company has reached a comprehensive long-term and in-depth strategy with many respectable users such as CSSC, AVIC, China Electronics Technology Corporation, Military Academy, Motorola, Toshiba, etc.
Facing the ever-increasing needs of globalized users for individualization, diversification, and internationalization, the company is committed to continuously improving its ability to carry out in-depth and customized research and development for users with special environments, special performances, and special requirements. They develop -8H response -24H on-site-ten-year maintenance “service policy, wholeheartedly committed to providing more competitive lithium battery custom quote solutions and products to global users, and work together with global users and partners to seek common development.
One segment of quality products created by Dongguan is 18650 lithium-ion batteries
18650 lithium-ion batteries are a popular choice for high-power devices. They also require long-lasting batteries in terms of capacity, low self-discharge rate, and large charge and discharge cycles. There are countless versions of 18650 lithium-ion rechargeable batteries with many functions, the most important of which are capacity, maximum pulse and continuous drain current, charging current, protection of electronic devices, etc. The dimensions of the 18650 lithium-ion battery are (diameter x length) 18.6 x 65.2 mm (0.73 x 2.56 inches), or around 18 x 65 mm. Actual dimensions vary slightly from manufacturer to manufacturer, but these small variations in size usually do not cause problems.
What to consider before buying a new 18650 lithium-ion battery?
Most devices support the use of these two 18650 lithium-ion battery types, capacity and maximum discharge current-these two values are closely related because high capacity designs limit the maximum safe discharge rate and vice versa, high discharge current designs limit.
The capacity of the lithium battery
For example, high-capacity 18650 batteries have a capacity of up to or even more than 5000 mAh, but the maximum safe continuous discharge rate of such batteries is usually in the range of 3-10 amps.
On the other hand, 18650 lithium-ion batteries can safely provide a continuous current of 20-30 amps and up to 40-50 amps for 1-5 seconds. The capacity of such batteries is usually in the range of 2500-3000 mAh.
Note: When promoting batteries, some manufacturers tend to overestimate the characteristics of their batteries. Therefore, it is important to read reviews and suggestions from other users, not just the specifications and features provided by the manufacturer. Or choose a reputable brand such as Dongguan and maybe pay more.
If there is a problem with the 18650 battery pack, replace all batteries with new batteries (such as old batteries) with capacity and charge/discharge current in the same range (or better). Always use the same battery from the same manufacturer, preferably from the same batch, and if you have to solder its lugs, ask a professional to solder it for you, as this can be tricky.
Because lithium-ion batteries are sensitive to charging and discharging conditions, temperature, and other parameters, some 18650 lithium-ion battery models have built-in protection electronics that monitor the battery’s parameters and protect the battery by turning it off when necessary change. Protective electronics require some space, so the capacity of the 18650 lithium-ion battery will be slightly reduced, unless your device already has some kind of battery monitoring feature.
Finally, when selecting a battery charger based on your needs, choose a battery charger based on your current and future needs.