01:08 <arossdotme-planb> i seam to have over discharged my laptop battery after leaving suspended for a day or 2 until it ran out of power. trisquel (ubuntu lts but with linux 4.* installed instead via a repo) looking at the /sys/class/power_supply/BAT0/ info. voltage file num is less than the num in voltage_min_design . i fear this means its been over discharged and so might not be able to charge?

01:08 <arossdotme-planb> status says its charging though

02:13 <DocScrutinizer05> strange

02:14 <DocScrutinizer05> but yeah, suspend-to-ram is a mode pretty much designed to kill battery on most laptops

02:15 <DocScrutinizer05> I killed my ASUS OLPC(?) battery after only 2 months and ~3 charge cycles, with leaving it in suspend2ram

02:19 <arossdotme-planb> asus netbook you mean?

02:19 <arossdotme-planb> dam, i really hope i havnt

02:19 <arossdotme-planb> well i have one pack left which is my bigger one at least

02:20 <arossdotme-planb> i would have thought a hardware batt protection would have kicked in?

02:21 <arossdotme-planb> well maybe/i guess i just have to acceptance the truth

02:27 <DocScrutinizer05> you'd think there *must* be a hw protection against deep discharge. seems it doesn't always work or even exist

02:29 <DocScrutinizer05> when the cells in battery pack are not properly balanced (both in production for properies and during battery management for discharge) I can see how discharging the pack can result in one cell getting deep discharged while the others till provide sufficient voltage so complete battery pack in within specks

02:30 <DocScrutinizer05> ~6*3.0

02:30 <infobot> 18

02:30 <DocScrutinizer05> 5*4.0

02:30 <DocScrutinizer05> ~5*4.0

02:30 <infobot> 20

02:30 <DocScrutinizer05> see what I meant?

02:31 <DocScrutinizer05> while a cheap battery protection might kick in at 18 volt, already at 20V one of the cells might see reverse charging which for sure kills it

02:45 <arossdotme-planb> arr ok

02:46 <arossdotme-planb> would that mean one of the cells has become a ticking time one in that example you gave? the reversed charging/too low one

02:46 <arossdotme-planb> ticking time bomb

02:46 <arossdotme-planb> fire hazard, etc

03:34 <DocScrutinizer05> possible, yes

03:34 <DocScrutinizer05> though batteries usually explode only when you try to charge such dead cell

03:35 <DocScrutinizer05> and even then it's a rather rarely seen problem

03:36 <DocScrutinizer05> violent venting and heat however may happen

03:37 <DocScrutinizer05> real bombs only happen when some 'smartass' thought it's a nice idea to put a number of 18650s into a sealed waterproof housing made of airplane alu

03:37 <DocScrutinizer05> http://www.candlepowerforums.com/vb/showthread.php?262234-TK-Monster-Explosion

03:40 <DocScrutinizer05> >>I inspected the 8 green 18650 batteries that came with the light to check what kind of charge they were in. 4 of the batteries were at 100% and the other 4 had no charge. I charged the 4 batteries and came back to them shortly after to find them charged already. I carefully placed the batteries back into the light observing the polarity. << exactly the "unbalanced" case mentioned above that you *mist* avoid by all means. Also

03:40 <DocScrutinizer05> charging dead batteries here, then giving them massive discharge in a pack mixed with good cells

03:41 <DocScrutinizer05> >>and came back to them shortly after to find them charged already<< should have made that dude wonder

03:43 <DocScrutinizer05> defect or dead or even fake 18650, charge them for a short while, then expect "well, everything OK and easypeasy, no?"

03:43 <DocScrutinizer05> then operate a 100W(?) flashlight from them

03:44 <DocScrutinizer05> yeah, when cells vent in a sealed alu tube, that's pretty much what you call a pipe bomb

04:52 <DocScrutinizer05> (100W?) 250 actually

10:57 <arossdotme-planb> huh thanks for telling the story

10:58 <arossdotme-planb> know of anyway to get cheep but good li-* 12v+ 12AH min packs from?