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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 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 cond
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[{"type":"image","alt":"HPQ Silicon Inc.","displaySize":"","headline":null,"caption":"HPQ Silicon Inc.","className":"","disableSlideshowImg":false,"size":{"original":{"width":300,"height":121,"url":"https://media.zenfs.com/en/globenewswire.com/b2a8f21a0ee7118709e40b31cdd87963"},"resized":{"url":"https://s.yimg.com/ny/api/res/1.2/MlnWgUe5DYBSR19mIupDxA--/YXBwaWQ9aGlnaGxhbmRlcjt3PTQyMDtoPTE2OQ--/https://media.zenfs.com/en/globenewswire.com/b2a8f21a0ee7118709e40b31cdd87963","width":300,"height":121}},"lazy":false},{"type":"list","items":[{"val":[{"type":"text","content":"GEN4 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]","length":227,"tagName":"p"}]},{"val":[{"type":"text","content":"Deep-discharge cycling protocol (0.55V lower cutoff) indicates the potential to extend the operating voltage range of GEN4 lithium-ion cells beyond conventional limits","length":167,"tagName":"p"}]},{"val":[{"type":"text","content":"70 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 ","length":194,"tagName":"p"}]}],"tagName":"ul","bulletedList":true,"length":588,"olType":false},{"type":"text","content":"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.","length":525,"tagName":"p"},{"type":"text","content":"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 conventi...