Main Question or Discussion Point
Can mixing (in series) old cells with new cells of the same voltage and rating damage the new cell? If so why? The cells are recharable.
The only cell that works good on is lithium-ion. Lead acid is not too bad. Nicad and nickel-metal hydride are history dependent. That means either a charge or discharge perturbes the voltage which slowly returns to the normal curve. Heat can make these cells drop voltage which fools a charger into burning them up.david90 said:Can OCV test accurately tell the charge level of a cell?
I find that the voltage only decreases when a load is applied.david90 said:I notice the voltage of my old cells increase slower than my new cells after a load is applied. What does this say about the old cells?
When lead acid cells get old they fall apart. The best thing to do is keep a separate string and prepare to throw them away.david90 said:If I have to mix cells, what are some ways to bring them down to the same charge level or get the most life out of them?