Business
HPQ Silicon's Industrial Lithium-ion GEN4 21700 Cells Surpass 7,000 mAh - Based on Extended Test Conditions
GEN4 21700 cells break the 7,000 mAh barrier, achieving a record capacity of 7,030 mAh, which may...
About this update from Hpq Silicon Inc
[{"type":"text","content":"HPQ Silicon’s Industrial Lithium-ion GEN4 21700 Cells Surpass 7,000 mAh — Based on Extended Test Conditions\nGEN4 21700 cells break the 7,000 mAh barrier, achieving a record capacity of 7,030 mAh, which may represent one of the highest capacities reported to date in an industrial 21700 format, based on publicly available data [1]Deep-discharge cycling protocol (0.55V lower cutoff) indicates the potential to extend the operating voltage range of GEN4 lithium-ion cells beyond conventional limits70 cycles achieved with less than 2% capacity degradation indicate stability under extended deep-discharge conditions that would typically result in significant degradation in conventional cells MONTREAL, April 15, 2026 (GLOBE NEWSWIRE) -- HPQ Silicon Inc. (“HPQ” or the “Company”) (TSX-V: HPQ, OTCQB: HPQFF, FRA: O08), today announced that 21700 cylindrical cells manufactured using Novacium SAS’s GEN4 silicon-based anode material have surpassed 7,000 mAh of discharge capacity, based on internal testing conducted under extended operating conditions [1]. This result was achieved under a modified deep-discharge cycling protocol, with a lower voltage cutoff of 0.55V, compared to the industry-standard 2.5V. Commercially available 21700 graphite cells typically deliver between 4,800 and 5,000 mAh. The previous Novacium GEN4 record stood at 6,696 mAh under standard conditions (0.1C, 4.2V–2.5V, 25°C) [2]. Crossing the 7,000 mAh threshold required departing from conventional testing protocols and accessing a voltage window previously considered incompatible with long-term cycling stability in conventional lithium-ion chemistries [3]. What makes this result scientifically significant is not merely the capacity figure, but the demonstrated cycle stability achieved alongside it. A discharge to 0.55V would typically result in significant and irreversible degradation [3] in conventional graphite or silicon-based cells. Novacium’s GEN4 material completed 70 full cycles under this protocol with less than 2% capacity degradation, indicating that its silicon-based material may tolerate extended operating conditions beyond those typically used in conventional lithium-ion cells. These results suggest the potential for expanded operating windows in lithium-ion cell design, subject...