Old question, unanswered? Since my P3P will be arriving soon, I have been researching the topic. I found a great article at
Battery University
I will quote portions:
"Environmental conditions, not cycling alone, govern the longevity of lithium-ion batteries. The worst situation is keeping a fully charged battery at elevated temperatures. Battery packs do not die suddenly, but the runtime gradually shortens as the capacity fades.
Lower charge voltages prolong battery life and electric vehicles and satellites take advantage of this. Similar provisions could also be made for consumer devices, but these are seldom offered; planned obsolescence takes care of this."
I learned years ago as a photographer who went through a lot of batteries, to go with a slow charger vs. a fast charge. My fast chargers were reserved for urgent recharging needs. I will be looking for a slower charger for mine vs. the higher output one that comes with the Pro.
"
Depth of discharge Discharge cycles
100% DoD 300 – 500
50% DoD 1,200 – 1,500
25% DoD 2,000 – 2,500
10% DoD 3,750 – 4,700"
We learn here not to fully discharge the batteries and it is best to use down to 10%.
The page linked to above has a LOT of information with more links to discharging batteries and calibrate them. In the discharging section they call us out
"Remote control (RC) hobbyists are a special breed of battery users who stretch tolerance of “frail” high-performance batteries to the maximum by discharging them at a C-rate of 30C, 30 times the rated capacity. As thrilling as an RC helicopter, race car and fast boat can be; the life expectancy of the packs will be short. RC buffs are well aware of the compromise and are willing to both pay the price and to encounter added safety risks."