2015-09-26 00:03 wildlander has quit [Quit: Saliendo] 2015-09-26 00:13 sandeepkr has quit [Remote host closed the connection] 2015-09-26 01:08 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? 2015-09-26 01:08 status says its charging though 2015-09-26 02:13 strange 2015-09-26 02:14 but yeah, suspend-to-ram is a mode pretty much designed to kill battery on most laptops 2015-09-26 02:15 I killed my ASUS OLPC(?) battery after only 2 months and ~3 charge cycles, with leaving it in suspend2ram 2015-09-26 02:19 asus netbook you mean? 2015-09-26 02:19 dam, i really hope i havnt 2015-09-26 02:19 well i have one pack left which is my bigger one at least 2015-09-26 02:20 i would have thought a hardware batt protection would have kicked in? 2015-09-26 02:21 well maybe/i guess i just have to acceptance the truth 2015-09-26 02:27 you'd think there *must* be a hw protection against deep discharge. seems it doesn't always work or even exist 2015-09-26 02:29 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 2015-09-26 02:30 ~6*3.0 2015-09-26 02:30 18 2015-09-26 02:30 5*4.0 2015-09-26 02:30 ~5*4.0 2015-09-26 02:30 20 2015-09-26 02:30 see what I meant? 2015-09-26 02:31 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 2015-09-26 02:45 arr ok 2015-09-26 02:46 would that mean one of the cells has become a ticking time one in that example you gave? the reversed charging/too low one 2015-09-26 02:46 ticking time bomb 2015-09-26 02:46 fire hazard, etc 2015-09-26 03:34 possible, yes 2015-09-26 03:34 though batteries usually explode only when you try to charge such dead cell 2015-09-26 03:35 and even then it's a rather rarely seen problem 2015-09-26 03:36 violent venting and heat however may happen 2015-09-26 03:37 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 2015-09-26 03:37 http://www.candlepowerforums.com/vb/showthread.php?262234-TK-Monster-Explosion 2015-09-26 03:40 >>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 2015-09-26 03:40 charging dead batteries here, then giving them massive discharge in a pack mixed with good cells 2015-09-26 03:41 >>and came back to them shortly after to find them charged already<< should have made that dude wonder 2015-09-26 03:43 defect or dead or even fake 18650, charge them for a short while, then expect "well, everything OK and easypeasy, no?" 2015-09-26 03:43 then operate a 100W(?) flashlight from them 2015-09-26 03:44 yeah, when cells vent in a sealed alu tube, that's pretty much what you call a pipe bomb 2015-09-26 04:52 (100W?) 250 actually 2015-09-26 04:53 sandeepkr has joined #qi-hardware 2015-09-26 05:06 sandeepkr has quit [Ping timeout: 240 seconds] 2015-09-26 05:30 sandeepkr has joined #qi-hardware 2015-09-26 06:50 tumdedum has quit [Read error: Connection reset by peer] 2015-09-26 06:50 tumdedum_ has joined #qi-hardware 2015-09-26 06:57 tumdedum_ is now known as tumdedum 2015-09-26 07:00 sandeepkr has quit [Ping timeout: 250 seconds] 2015-09-26 07:03 sandeepkr has joined #qi-hardware 2015-09-26 07:33 jekhor_ has joined #qi-hardware 2015-09-26 07:49 sandeepkr has quit [Ping timeout: 260 seconds] 2015-09-26 07:49 sandeepkr has joined #qi-hardware 2015-09-26 08:34 jekhor_ has quit [Ping timeout: 268 seconds] 2015-09-26 10:57 huh thanks for telling the story 2015-09-26 10:58 know of anyway to get cheep but good li-* 12v+ 12AH min packs from? 2015-09-26 13:28 sandeepkr has quit [Ping timeout: 264 seconds] 2015-09-26 14:35 wildlander has joined #qi-hardware 2015-09-26 14:58 sandeepkr has joined #qi-hardware 2015-09-26 15:05 arossdotme-planb has quit [Ping timeout: 256 seconds] 2015-09-26 15:17 arossdotme-planb has joined #qi-hardware 2015-09-26 17:43 jwhitmore has joined #qi-hardware 2015-09-26 18:21 jwhitmore has quit [Ping timeout: 240 seconds] 2015-09-26 18:47 jekhor_ has joined #qi-hardware 2015-09-26 19:16 _jungh4ns has quit [Read error: Connection reset by peer] 2015-09-26 19:22 jwhitmore has joined #qi-hardware 2015-09-26 19:34 sandeepkr has quit [Ping timeout: 272 seconds] 2015-09-26 19:42 jwhitmore has quit [Ping timeout: 240 seconds] 2015-09-26 20:40 jwhitmore has joined #qi-hardware 2015-09-26 22:31 jwhitmore has quit [Ping timeout: 246 seconds] 2015-09-26 22:51 jekhor_ has quit [Ping timeout: 264 seconds] 2015-09-26 22:52 FDCX has quit [Ping timeout: 240 seconds] 2015-09-26 23:07 FDCX has joined #qi-hardware