Quote:
Originally Posted by Aleron Ives
It depends how well you treat your battery. If you charge it to 100% regularly it could easily exhibit problems sooner than four years.
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Not with modern (Anything in last 15 years?) properly designed chargers.
Things that wear out LiPoly cell "batteries":
Total number of cumulative cycles
Elevated temperature (above 21 °C)
Time since manufactured.
All those are influenced by materials purity and manufacturing quality, so life can be 18 months to 10 years. Leaving uncharged for a year more likely to be an issue than keeping it on the charger, unless it's a rubbish charger. A Lithium cell/battery charger monitors temperature and voltage, sometimes gas too, and stops charging entirely, unlike Lead Acid or Nickel. Nickel hydride comes in two kinds. One has a recombination catalyst and the other is high capacity. The High capacity ones need about 1/20th of trickle charge of regular ones which need much less than Nickel Cadmium. Don't leave NiMH cells in a charger!