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best method of charging

The included travel adapter for the SF has an output of 5.0V. Is this the 'charge rate' and if so, is it on the high end of charge rates, particularly for a cell phone lithium-ion? Do travel adapters/wall chargers specifically have a higher charge rate because of the assumption that people traveling would be more pressed for time??

Would it be better to get another charger with a slower charge rate to prolong the life of the battery?

The example used in the Figure 3 shows a 4.2V charge and the article is pretty much referring to laptop batteries so using the included adapter is making me 'think'.... that I shouldn't?
 
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Just when I think there isn't much more to educate myself on concerning the fundamentals of smart phones something else pops up.

Well, Lithium-Ion is replacing Nickel Cadium ("Ni-Cad") because those old batteries had a memory problem wherein if they were not drained all the way each time before a charge they'd gradually become unable to be charged all the way up. Other issues as well have made Lithium take over.
 
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Well, Lithium-Ion is replacing Nickel Cadium ("Ni-Cad") because those old batteries had a memory problem wherein if they were not drained all the way each time before a charge they'd gradually become unable to be charged all the way up. Other issues as well have made Lithium take over.
Aside from the 'memory' aspect, what I was actually referring to was the 'wear and tear' the article was stressing on lithium-ion batteries.

" [FONT=Verdana, Arial, Helvetica, sans-serif]Generally speaking, batteries live longer if treated in a gentle manner. High charge voltages, excessive charge rate and extreme load conditions will have a negative effect and shorten the battery life. This also applies to high current rate lithium-ion batteries.

Not only is it better to charge lithium-ion battery at a slower charge rate, high discharge rates also contribute the extra wear and tear.
"

I don't know if charging it at 5.0V for each and every charge cycle is making the battery deteriorate at an unnecessarily faster rate. Maybe I should find an adapter with a lower voltage as I prefer to turn off and unplug the laptop at night.
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