*Removes charged cell from charger... 😬
I assume It's bad practice for li ion cells too?
Thanks for the advice!
You're welcome. I guess I should clarify too: This 'issue' is a defect in design or manufacture, and the charger should not do this, regardless of how long the cells are left in the charger following termination. In most cases, such chargers will actually likely draw a very small amount of current from cells left in a charger following charge cycle termination, if anything. In this specific case however, as the cell's voltage settles to some threshold, it will begin very slowly charging the cell, as if to 'top it off', which should not occur, and to make matters worse it will ultimately charge it to ~4.2V then, not the correct 3.6V it initially charged them to. To make matters even worse, the display will not reflect this, but instead remains showing 3.6V from the initial termination. It can be measured / verified with a voltmeter though. It's a little twisted.
That said, the scenario requires both that defect, combined with bad practice to ever occur. The user reporting it had left the cells in the charger for many hours (until some time the following day), and it takes several hours (I forget exactly how many) for it to become an issue at all.
I continue to use the VP2s I have, including for LFPs, as they're otherwise good chargers for what they do. it's effectively a non-issue for me, I just wanted to mention it, because if one charges LFPs and just forgets about them / leaves them in the charger, it will happen. Unless someone does something silly, it's a non-issue in practice. I'll call it a defect with a 'workaround' - common sense;-)
