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Pinecone · 11-20-2011, 04:59 PM

Actually I know of cells that have been damaged (significantly reduced capacity) when left fullly charged (4.2 volts per cell) for a couple of weeks.

And 50% charge is not the optimum for life based on holding that charge. It is the optimum compromise between low voltage storage and not worrying about self discharge causing the the cell to go below the minimum voltage.

11-20-2011, 04:59 PM	#14
Pinecone Guru Posts: 902 Karma: 1660722 Join Date: Nov 2009 Location: Maryland Device: PRS-650, PRS-600, PRS-350	Actually I know of cells that have been damaged (significantly reduced capacity) when left fullly charged (4.2 volts per cell) for a couple of weeks. And 50% charge is not the optimum for life based on holding that charge. It is the optimum compromise between low voltage storage and not worrying about self discharge causing the the cell to go below the minimum voltage.