That guide is due to the physical chemistry and kinda like a law of physics for all rechargeables. Partial recharge can be had sooner, but the pores of the internal matrix (several different design types) are not fully replenished and repeatedly doing that can shorten the life of the batteries. Cell phones "just waiting" or doing purely local stuff don't deplete the battery much. Talk time is the greedy consumer. Your usage profile sounds like a partial depletion. I would not regard that "15%" as an accurate assessment of the physical chemistry. It's most likely just a terminal emf reading that is at best a wild estimate. Battery engineering is a complex topic.. not simple at all, as manufacturer's tech support info will show. I use good lIon batteries for my call phone and cameras. I can get quicker response (that doesn't last well), so I just swap and leave the discharged battery in the charger's recess overnight. I often use a USB attachment to my PC for data sync, etc, and that also keeps the charge up but is not my "trusted" source :-) Chuck _____ From: tclug-list-bounces at mn-linux.org [mailto:tclug-list-bounces at mn-linux.org] On Behalf Of Erik Anderson Sent: Monday, July 29, 2013 3:24 PM To: TCLUG Mailing List Subject: Re: [tclug-list] Ubuntu Edge On Mon, Jul 29, 2013 at 3:05 PM, Chuck Cole <cncole at earthlink.net> wrote: (batteries take at least 3 times as long to fully recharge as to discharge) (going OT here, but am genuinely curious) What kind of batteries are you using? At the end of a typical day, my iPhone battery is depleted down to 15% or so. I'm averaging about two hours of browsing/email usage per day and 30 minutes phone usage, and I'm able to get it back to full charge within 45 minutes. I have similar experiences with my Macbook Pro, which I get ~6 hours of battery life out of (as long as I force it to use only the integrated GPU), and am able to get it fully charged within 2 hours. -Erik -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mailman.mn-linux.org/pipermail/tclug-list/attachments/20130730/96917d38/attachment.html>