Sven Yrvind · vídeo

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Sven Yrvind assembles a backup power system for his small boat, centering on two portable power banks from different manufacturers as redundant sources.0:29 He charges an old iPhone that has sat unused for eight or nine years, verifying it still works before committing it to the system.1:35 A charger delivering 30 volts is used in the process.1:15 Both power banks are then wrapped in aluminum foil — a makeshift Faraday shielding intended to protect the electronics if lightning strikes.1:22 A solar charging source is also mentioned as part of the setup.2:10 The work is framed as preparation for an upcoming offshore passage, with the boat described as getting closer to being ready.0:12 The core logic is redundancy: two power banks from separate companies, shielded against lightning, paired with solar input, so at least one source survives a strike.

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