Mobile phone reverse power unlocking, battery-free NFC strip cam lock is efficient and environmentally friendly.
- Jul 11
- 5 min read
In shared office space, library shelves, industrial control cabinets and other scenarios, traditional locks have become a “stumbling block” to space management due to problems such as “difficult to adapt to narrow cabinets, high cost of battery maintenance and inefficient key management”. Battery-free NFC cam locks with cell phone reverse power supply technology and ultra-thin design create a green intelligent solution of “zero battery, second unlocking, and full-scene adaptation” for narrow spaces, and redefine the standard of locks for long and narrow spaces.
The three major application dilemmas of traditional narrow locks, have you ever encountered?
1. Poor adaptability of the cabinet:
1. Ordinary round locks up to 50mm in diameter, can not be installed in the thickness of <30mm narrow cabinets (such as intensive shelves, ultra-thin lockers), a library due to the size of the lock does not match, forced to retain mechanical locks to manage the antiquarian bookshelf, the key loss rate of 15%;
2. Long mechanical locks need to be manually twisted, locking time consuming more than 10 seconds, easy to cause queuing congestion during peak periods.
2. Battery maintenance nightmare:
1. Narrow electronic locks built-in battery capacity is small, life expectancy of only 3-6 months, a cross-border e-commerce logistics control cabinets average annual replacement of batteries more than 3,000 times, labor costs up to 200,000 yuan;
2. Battery volume limitations lead to poor heat dissipation of the lock body, 10% of the locks in the summer under high-temperature environment, circuit short-circuit failure.
3. Environmental protection and security double short board:
1. Traditional electronic locks produce a large number of waste batteries each year, a shared office brand annual consumption of battery 5000 + section, environmental pollution and processing costs are rising;
2. Low anti-theft level of mechanical locks, an industrial control box has been picked due to locks, resulting in production line downtime of 8 hours, direct losses of more than 500,000 yuan.
Cell phone reverse power supply + long strip cam: five core technologies to crack the narrow space problem

1. Reverse power supply from cell phone: redefining “battery-free” locks
· technical principle: no need for built-in battery, through the cell phone NFC function (13.56MHz band) to the lock body reverse power supply (single unlocking power consumption is only 0.01mAh), cell phone close to the lock body 1 second to complete the identity verification and unlocking, support for iPhone 7 and above /iOS 13+, Android NFC models;
· Scenario value: after the deployment of an intelligent dense rack manufacturer, the “quarterly battery change” process has been completely eliminated, and the annual maintenance time of 2000 groups of archive racks has been saved for more than 300 hours, which is equivalent to saving 2 full-time manpower.
2. Long Cam Slim Design: “Tailor-made” for Narrow Cabinets
· Innovative form: the width of the lock body is only 20mm and the depth is 35mm, which is suitable for narrow cabinets with 15-40mm thickness (such as mailboxes, reagent cabinets, control cabinets), and the surface of the lock body only reveals 10mm of operation area after installation, which prevents accidental touching and collision;
· is easy to install: no need to punch and ream holes, compatible with 99% of the original lock holes of narrow cabinets, 10 minutes to complete the replacement of the old locks, a hospital pharmacy remodeling 200 medicine cabinets, the total time consumed compared with the traditional program shortened by 70%.
3. AES-256 encryption + IP66 protection: a “security fortress” in a narrow space.
· Financial-grade security: military-grade AES-256 encryption algorithm, generating a unique dynamic key each time it is unlocked, anti-violent cracking time of more than 30 minutes, anti-middleman attack on data transmission, security level 1000 times higher than that of traditional mechanical locks;
· full environmental adaptation: level 6 dustproof (completely blocking dust) + level 6 waterproof (anti-high-pressure water gun rinse), through the -20 ℃ ~ +60 ℃ wide-temperature test, in the laboratory acidic and alkaline environment (PH value of 4-10) continuous work for 2 years without corrosion, suitable for medical, chemical and other demanding scenarios.
4. NFC One Touch Open: “Seconds Revolution” for Efficiency Improvement
· operation is extremely simple: the phone is close to the lock surface automatic identification, no need to wake up the screen or open the APP (support rest screen unlocking), single cabinet unlocking time consumption is stable at 1.5 seconds, compared with the traditional long lock (manually twisting takes 8 seconds) efficiency increased by 5 times;
· dual system compatibility: in-depth adaptation of iOS and Android ecosystems, support for enterprises to batch configure employee rights, a chain of shared offices through this function, the authorization time for new employees lockers from 10 minutes to 30 seconds.
5. Environmental protection and cost reduction: redefining “sustainable security”.
· Zero-battery design: A single lock can reduce battery consumption by 120 batteries over a 10-year life cycle. A smart city project deployed 5,000 locks, and the cumulative reduction in battery pollution is equivalent to planting 200 fir trees;
· Full-cycle cost: the total cost of traditional electronic locks for 5 years (purchase + maintenance) is about $150/pc, while battery-free locks only require an initial purchase cost of $80/pc, which is a 47% reduction in cost.
The whole scene evidence: from intensive shelves to the control cabinet of the narrow space to break the game
1. Intensive library shelves
· The National Library of China adopts long cam locks to manage the dense shelves of ancient books. Researchers unlock the shelves with a touch of a cell phone, and the authority is automatically assigned according to “reading file level”, so that the efficiency of accessing ancient books is increased by 60%, and the delay in accessing the books caused by the key management errors is zeroed out.
2. Industrial Control Cabinet
After · is deployed in a new energy automobile factory, 2,000 electronic control cabinets realize “one lock, one authorization”, engineers' cell phone privileges are automatically opened/closed with the work order, abnormal lock triggering APP alarms, and the rate of equipment misuse is reduced by 92%, which meets the requirements of IATF 16949 quality management system.
3. Shared office lockers
· A co-working brand uses this locker in narrow wall lockers. Users reserve the authorization through a small program, open the box with a touch of the cell phone when they arrive at the store, and the authorization is automatically recovered when they withdraw from the lease, which improves the utilization rate of the space by 30%, and the number of customer service inquiries about “key problems” drops by 95%.
Customization services: let the narrow locks become the space design of the “invisible guard”
As an electronic locksmith factory, we offer full dimensional customized solutions:
· Dimension customization: support flexible adjustment of cam length (20-50mm) and lock body width (15-25mm), adapting to shaped and narrow cabinets (e.g. curved lockers, embedded mailboxes);
· Function Expansion: Integration of “two-person dual-lock authentication” (double authorization for important reagent cabinets), “timeout not closed reminder” (APP push notification), “operation log export “(docking OA system) and other exclusive functions;
· Appearance design: Matte colors such as elegant black, titanium silver and deep sky gray are available, and the lock surface can be laser-engraved with brand LOGO or operation guideline icon, which is perfectly integrated with the narrow space design style.
Conclusion: When Narrow Space Meets “Battery-Free” Technology
The long cam lock unlocked by the reverse power supply of cell phone is not only an innovation in the lock form, but also an efficiency revolution in the management of narrow space -- from “difficult to adapt” to “tailor-made”, from “high-frequency maintenance” to “zero-consumption saving”. From “high-frequency maintenance” to “zero-consumption”, behind every second unlocking is the re-empowerment of technology on the value of space.
Serving 100+ narrow scenarios of government and enterprises, and passing 12+ international certifications such as CE, RoHS, etc., every inch of your space is guarded by our technology!




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