Grepow has unveiled a technical white paper detailing its patented E-stacking curved battery technology, designed specifically for smart rings.
The innovation delivers up to 30% higher capacity in the same volume, while enhancing reliability and comfort in ultra-compact wearables.
As the smart ring market heads toward multi-billion-dollar growth by 2030, battery life and form factor remain key challenges. Traditional methods – winding flat cells into arcs – introduce mechanical stress and inefficient use of space, compromising long-term performance.
Grepow’s E-stacking process enables curved battery cells to achieve up to 21mAh capacity, compared with 16mAh in conventional equivalents, and supports over 500 stable cycles. A separate patent introduces a curved dual-tab design, allowing cells as narrow as 4.1 mm (typically 6mm), offering greater flexibility for slimmer, more adaptable wearables.
Each cell undergoes 100% X-ray and CCD inspection to ensure safety and reliability. The use of advanced silicon-carbon anode formulations further boosts capacity and volumetric energy density by 17.2%.
Designed to overcome the core limitations of ultra-compact wearables, the approach delivers up to 30% higher capacity in the same volume while improving reliability and comfort.
By removing long-standing constraints in small-form-factor battery design, Grepow’s technology supports thinner, lighter, and longer-lasting smart rings – enabling continuous health monitoring, gesture control, and biometric sensing.
