I don't want to go too far away from frequencies and voltages but I sincerely doubt I will be opening a new topic for batteries.
To answer your question, I have played with most of those apps at one time or another. They are all interesting and, to some extent informative though I am not convinced they are 100% accurate.
Nothing saves my battery more than proper use, maintenance and turning off my device. Seriously, what we do on our devices - the zillion apps we run, most of which like to start up on their own at boot time with most users having no clue.. well, those eat up battery. So does the scren and internet and.. well, you know what I mean.
If I was to open a new topic on this I would likely (once again) talk about the myth of deleting the battery stats file (that and task 29 top my list of useless things to do!) and probably talk about plain maintenance, as in charging.
We have all heard about the "
memory effect" -- that if you don't "
teach" your batteries their full potential by taking them from totally full to totally empty, they'll "forget" part of their capacity. Although battery memory is a real thing, it applies to nickel-based batteries not the lithium-ion battery most new devices use. Lithium-ion batteries should be topped off whenever you get the chance.
Yes, you read that right!These batteries should be kept in the top half of the charged status much of the time. Going from full to empty and back won't help much, in fact, it'll do a little damage if you do it too often. That said, it's smart to do one full discharge about once a month for "
calibration," but I surely don't do it all the time. Running it up and down 100%
on a regular basis will shorten its lifespan.
Lithium-ion batteries can get overheated if you are constantly charging them but most of today's chargers are smart enough to cut your phone off once it's full. These batteries don't like being 100% charged either - go figure. They will generally perform best if you take them off the charge before they hit 100 percent. You can safely go from, say 30% or 40% to just a tad past 80% and back for best performance.
Keep them cool whenever possible as heat is the enemy of all batteries and for the pioneers among us, the inductive, wireless chargers out there today can generate a fair bit of waste heat.
Okay, enough off topic chatter. If anyone really needs more on batteries there was a decent article last year in Gizmodo called "
The Absolute Definitive Guide" worth reading.
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Which is worse: ignorance or apathy? Who knows? Who cares? 
