Old post on iontophoresis machinesHow to make a battery bank using old phone batteries

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Joined Aug 1, 2018
Its more elegant to use only all identical cells - the main issue is paralleling loads of cells with random amounts of charge. join them all up with current limiting resistors first, leave them to equalise before hard linking them all in parallel.
Hi IAN I saw an Old post on iontophoresis machines. Where can I find information on how to build one based on commercial available circuits?