battery life

[derf]

dear all,apologies if this is too entirely noob doesn't apply to you, but found this very helpful article on making lipo batteries last longer (on my old pedelecs, a lafree twist with NiMH periodic full discharge was mandatory to prevent memory effect, this article proves sincerely that one should avoid full discharge on lipo at all cost)
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries

 

[flecc]

In the interests of long life, the lower voltage cut-off on e-bikes is set at a level safely above fully discharged.

The lowest limit practical limit is circa 2.7 volts per cell, but e-bike cut-offs are usually set at 3.1 to 3.2 volts per cell, leaving at least 25% of available charge in each cell.

So in e-biking the warning only applies if attempting a discharge via other means, such as resistors or filament bulbs.
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[Deleted member 4366]

I wouldn't take too much notice of that. Most batteries die through neglect and other problems long before they wear out. Also, there's new cells now that behave differently. Just enjoy your bike. Charge it until the light goes green . Never under-charge it because the balancing only happens when it's nearly full. Try not to run it right down if it's avoidable.

 

[Deleted member 4366]

The lowest limit practical limit is circa 2.7 volts per cell, but e-bike cut-offs are usually set at 3.1 to 3.2 volts per cell, leaving at least 25% of available charge in each cell.
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Once the cells get to about 3.4v (3.0v for LiFEPO4), they start to accelerate downwards in voltage as they give up their charge. By the time they get to 3.1v, it's as good as vertical. I'd say that the difference between 2.7v and 3.3v is probably less than 1% of the total charge. The only way you can get more energy out of them at 3.1v is to set fire to them.