You absolutely sure 'bout that? From what I've read Lithium Ion battery life is determined by the number of full cycle charges, not by the frequency of charges. But, I have been wrong before and certainly could be in this instance.
Yep, that answer was correct. While they quote "charge cycles", it's really the cumulative time a battery is charging that counts.
Mmm, maybe, but the battery heats up when charging from empty so it should be better for the battery to charge lightly rather than deep charging.
Yep, and likewise, the slower you charge it, the better. I charge at 250mA if I'm not in a hurry. The Radius charges at 800mA. Most newer chargers can charge at 1A, and a couple can charge at 2A. I haven't seen higher in a charger, but several of the better 18650's have a 4A MAX charge rate. I wouldn't expect it to last very long...
Is there a way to stop a charge cycle at 4.0 or 4.1 other than watching the charge progress closely?
Haven't seen that feature, but research the LiFeP04 chargers, such as the Nitecore D2/D4. LiFePO4 (for example) have a lower nominal and maximum voltage, so a charger that can charge that chemistry will cut off at 3.6-3.7V - just do your research before going down that path!
This is interesting and will change the way I charge my Radius battery, which I don't run down completely, but I have been charging ever other day. Based on this, I'll likely charge it every night, while I sleep. Especially if it will [possibly] increase the life of the battery.
The reality of the situation is that based on your usage pattern, if you charge it from empty to full every other day, you'll notice it not holding as much of a charge after 2 years.
batteries don't just die - they lose a little capacity with every "charge cycle" (1 full charge, 10 1/10th charges, etc.). In the end,
batteries cost what, $8 - so you're spending $4/year on
batteries? While this has been educational, I say use them however is most convenient for you, and when they don't last as long, get a new one.
I'm not sure. If you use a p3 you change battery when it's worn down then recharge it. A good charger shouldn't cause the battery to get hot.
It's not the charger (more on this in a moment) so much as it's the charge current. The higher the charge current, the higher the internal heat. While most good chargers monitor temperature so they don't get dangerously hot, they can get quite hot on a fast charge. Back in the NiCd/NiMH days, you HAD to monitor temperature to know when it was done charging, as a sudden increase in temperature meant the battery was done charging.