arduino - Is it okay to connect 2 lithium ion battery in parallel to a charger that can maintenance 4.2V? (more detail in post) - Electrical Engineering Stack Exchange
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A circuit to use 2 single cell li-po / li-on batteries in series and charge them in parallel | 42 Bots
Is it possible to charge 2 lithium batteries of 3.7V each with its charger in parallel? - Quora
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