01:31 <arossdotme-planb> whitequark, this site is popular on a mountain bike forum but is $8.99 for protected and $4.59 unprotected inc worldwide shipping too good to be true/ =fake? http://www.kaidomain.com/product/details.S024110

01:33 <whitequark> dunno

01:37 <arossdotme-planb> kyak, thx

04:35 <kyak> arossdotme-planb: np

10:32 <DocScrutinizer05> arossdotme-planb: http://eu.nkon.nl/panasonic-ncr18650b-made-in-japan.html?gclid=CKr8iaLOq8oCFYOfGwodkdoP4w seems legit normal price

10:33 <DocScrutinizer05> ""NKON is settled in the Netherlands.""

10:36 <DocScrutinizer05> ~2600/2.65

10:36 <infobot> 981.132075471698

10:37 <DocScrutinizer05> http://eu.nkon.nl/rechargeable/18650-size/lg-18650-b4-2600.html

10:37 <DocScrutinizer05> ~3400/4.25

10:37 <infobot> 800

10:37 <DocScrutinizer05> http://eu.nkon.nl/panasonic-ncr18650b-made-in-japan.html?gclid=CKr8iaLOq8oCFYOfGwodkdoP4w

10:38 <DocScrutinizer05> the cheaper ones are only 2.6Ah but more Ah/buck

10:40 <arossdotme-planb> or kyak was accidental tab auto complete was meant to be k thanks whitequark :)

10:41 <arossdotme-planb> thx DocScrutinizer05

10:41 <DocScrutinizer05> yw

10:42 <DocScrutinizer05> ""Buy 540 times for €3.29 "" ;-)

10:43 <DocScrutinizer05> ~540*3.4*3.7

10:43 <infobot> 6793.200000000001

10:43 <DocScrutinizer05> 6.8kWh

10:43 <arossdotme-planb> :)

10:43 <DocScrutinizer05> ~540*3.29

10:43 <infobot> 1776.6

10:44 <DocScrutinizer05> EUR

10:44 <arossdotme-planb> :o

11:00 <DocScrutinizer05> arossdotme-planb: anyway what for do you need those cells? You always need to choose on the tradeoff between high current/power (Ampere, Watt) cell and high capacity/mAh cell

11:01 <DocScrutinizer05> those above are high capacity cells with only 2C (max 6A) discharge

11:03 <DocScrutinizer05> for RC etc you can get 10C or even 30C cells

11:04 <DocScrutinizer05> those have less chemistry for energy storing and more metal in the electrodes for high current

11:04 <arossdotme-planb> the Panasonic ones i was thinking for a light usb power bank to go with my gta04 and my other use was a 14.8v min batt pack for powering power audio amps class-d 2x45w out (19-24V*3A in) and 150w into 8ohm amps too, and netbook laptop

11:04 <arossdotme-planb> *lighter weight

11:06 <arossdotme-planb> hmm

11:06 <arossdotme-planb> my car 14v 4x45w class d amp has a 15amp fuse....

11:06 <DocScrutinizer05> 5S2P, 10 cells, should do

11:07 <DocScrutinizer05> ~4*45/12

11:07 <infobot> 15

11:07 <arossdotme-planb> :)

11:07 <DocScrutinizer05> ~5*3.6

11:07 <infobot> 18

11:08 <DocScrutinizer05> ~5*4.2

11:08 <infobot> 21

11:10 <DocScrutinizer05> wait, "... other use was a 14.8v min batt pack..." " (19-24V*3A in)" ??

11:12 <DocScrutinizer05> 5S2P can deliver 18V * 2C * 2(parallel)

11:12 <DocScrutinizer05> ~18*7.2*2

11:12 <infobot> 259.2

11:12 <DocScrutinizer05> Watt

11:13 <DocScrutinizer05> at that rate, the pack is depleted after nominal 30 minutes, RL 15 minutes

11:16 <DocScrutinizer05> never forget about balancing for Series packs!

11:17 <DocScrutinizer05> both during charging and for monitoring discharge end voltage

18:24 <arossdotme-planb> DocScrutinizer05, yea, beening wondering about blancing. i have a rc charger to take care of that but i wonder when building diy packs using batts from the same order (say from nkon) will they be the same batch or from differant batches? do i need to monitor indevidual cells or will it be ok to put sets in parallel (and hope for the best)?

18:25 <arossdotme-planb> for discharging i have a rc batt monitor/alarm that shows each cell pack voltage and sounds an alarm when one cell set is out of balance.

18:27 <arossdotme-planb> i hope/guess there’s less risk using the Panasonic 3400mah cells as i would need less of them.

18:27 <whitequark> get protected cells, then you don't have to care when discharging

18:28 <whitequark> as the protection circuit will disconnect any cell with undervoltage condition

18:28 <arossdotme-planb> nkon looks like the best place to buy from and ship to uk. as uk places ive found so far are over priced considerably

18:29 <arossdotme-planb> whitequark, oh yea, your right. hu i was looking at the protected ones available at nkon

18:29 <arossdotme-planb> double the price though

18:29 <arossdotme-planb> better than death :)

18:30 <whitequark> they're still very cheap

18:31 <arossdotme-planb> battery holders https://www.thingiverse.com/thing:456900/#comments

18:32 <arossdotme-planb> the better diy usb pwr banks have cell monitoring http://www.gearbest.com/chargers/pp_246290.html

18:39 <whitequark> ha, that holder design is pretty great

18:59 <arossdotme-planb> yea it is

19:00 <arossdotme-planb> ant tried it.... but looks good

19:00 <arossdotme-planb> my bad, nkon are 3x the price for protected. china was 2x

19:01 <arossdotme-planb> dam

19:02 <arossdotme-planb> maybe i can find a nice protection board for less money that will do the same job

19:07 <arossdotme-planb> DocScrutinizer05, 14.8v is the min votage pack im thinking of doing i might add an extra cell set to get 18.4v undecided

19:07 <arossdotme-planb> (19-24V*3A in)=power input for my smaller power audio amplifier

23:26 <arossdotme-planb> just read up on S and P. yea 5S2P or 4S2P im think. maybe upto 4P :D depending on cost

23:33 <arossdotme-planb> wondering about rc packs again

23:33 <arossdotme-planb> while 6c i think will be enough for most things for somethings 12C or more probably would be better

23:34 <arossdotme-planb> bwt i found with audio power amps there current consumption depends on what music your playing. most of the time its only using 1,2,3 amps at least with my 2x45w amp. i think its similar for the 4x45w 12v-in one

23:34 <arossdotme-planb> so if its really bassy music

23:34 <arossdotme-planb> it needs lots of current

23:35 <arossdotme-planb> so the actual run times are longer than you might think as most of the time the 4xspk amp is well below 15amps

23:36 <arossdotme-planb> ping