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Mason Graphite updates Lac Guéret battery test results March 2, 2021 Topics Junior Mason Graphite (TSXV: LLG) has provided an update on testing of lithium-ion prototype battery cells made with graphite sourced from its Lac Guéret deposit, 660 km north of Montreal. The cells, which contain coated spherical purified graphite made at pilot-scale facilities located in Quebec City, have completed 800 charge/discharge cycles while retaining 82% of their initial capacity. “While the lithium-ion battery applications are highly diversified, with each manufacturer having its own requirements in terms of battery cycle life and associated capacity retention, reaching 800 cycles with such retention is a decisive milestone, significantly de-risking our ultimate objective of reaching 1,000 cycles with 80% retention,” said Jean L’Heureux, Mason Graphite’s COO.

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