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Engineered for Safety.
Built to Exceed Standards.
A power bank built to pass the toughest safety requirements.
True Safety Starts Inside True Safety Starts Inside
The quality and design of the battery cell are the foundation of a power bank’s safety, stability, and reliability.
The quality and design of the battery cell are the foundation of a power bank’s safety, stability, and reliability.
Dymondcell™ Technology
The Core of Safer Power
Dymondcell™ Technology
The Core of Safer Power
Every power bank is built around a battery cell. It’s the one component you never see, but the one that matters most.
Dymondcell™ is UGREEN’s advanced battery cell technology, engineered for greater structural stability, enhanced multi-layer protection, and reliable everyday performance.
From extreme heat and accidental drops to external pressure and overcharging, Dymondcell™ is built to handle the real-world demands a power bank encounters over its lifetime.
Every power bank is built around a battery cell. It’s the one component you never see, but the one that matters most.
Dymondcell™ is UGREEN’s advanced battery cell technology, engineered for greater structural stability, enhanced multi-layer protection, and reliable everyday performance.
From extreme heat and accidental drops to external pressure and overcharging, Dymondcell™ is built to handle the real-world demands a power bank encounters over its lifetime.
Discover Safer Power with Dymondcell™
Tested Beyond Everyday Limits
To ensure long-term safety and reliability, Dymondcell™ undergoes comprehensive testing designed to go far beyond everyday use.
Resistant to drops and impacts
Safe even when in contact with keys
Key Focus: Evaluates safety when subjected to severe external mechanical damage.
Test Method: A steel nail is driven through the battery cell to force an internal short circuit. Temperature rise, smoke, fire, and explosion risks are monitored.
Test Result: No fire was detected even after being pierced three times with a 4mm nail. A fire-resistant insulating layer forms inside the battery to help prevent ignition.
Resistant to swelling and deformation
Pack in your suitcase with peace of mind
Key Focus: Evaluates resistance against deformation and internal short circuits.
Test Method: The cell is pressed under a specified heavy load.
Test Result: Withstood 25 kN (approx. 2.5 tons) with only minor dents, showing no explosion or fire.
Safe for long-term use
Reduces risks caused by battery degradation
Key Focus: Evaluates the risk of internal short circuits and fire caused by dendritic lithium metal deposits inside the battery.
Test Method: Monitors capacity retention in lithium-ion batteries during active use.
Test Result: No abnormalities observed even after 800 charge cycles.
No need to worry if left plugged in
Safe to charge overnight
Key Focus: Evaluates the risk of fire or explosion when charged at a voltage and current higher than the battery's rated specs.
Test Method: Continuous charging at a constant voltage higher than the standard charge voltage.
Test Result: After reaching full charge, continuous overcharging at 1.3 times constant voltage for 7 hours resulted in no explosion or fire.
Reduces risks if left inside a vehicle
Resistant to extreme summer heat
Key Focus: Evaluates heat resistance when exposed to abnormally high temperatures, such as inside a car in direct sunlight or near heating appliances in winter
Test Method: Exposed to temperatures far higher than standard operational limits.
Test Result: Heated at 135°C for 1 hour with no explosion or fire.
FAQ
Look beyond capacity and charging speed. Battery cell quality, safety testing, and built-in protection systems are just as critical. UGREEN Dymondcell™ uses premium battery cells, rigorous safety testing, and multi-layer Battery Management System (BMS) for reliable everyday power.