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2016-01-15 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
2016-01-15 01:33 <whitequark> dunno
2016-01-15 01:37 <arossdotme-planb> kyak, thx
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2016-01-15 04:35 <kyak> arossdotme-planb: np
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2016-01-15 10:32 <DocScrutinizer05> arossdotme-planb: http://eu.nkon.nl/panasonic-ncr18650b-made-in-japan.html?gclid=CKr8iaLOq8oCFYOfGwodkdoP4w  seems legit normal price
2016-01-15 10:33 <DocScrutinizer05> ""NKON is settled in the Netherlands.""
2016-01-15 10:36 <DocScrutinizer05> ~2600/2.65
2016-01-15 10:36 <infobot> 981.132075471698
2016-01-15 10:37 <DocScrutinizer05> http://eu.nkon.nl/rechargeable/18650-size/lg-18650-b4-2600.html
2016-01-15 10:37 <DocScrutinizer05> ~3400/4.25
2016-01-15 10:37 <infobot> 800
2016-01-15 10:37 <DocScrutinizer05> http://eu.nkon.nl/panasonic-ncr18650b-made-in-japan.html?gclid=CKr8iaLOq8oCFYOfGwodkdoP4w
2016-01-15 10:38 <DocScrutinizer05> the cheaper ones are only 2.6Ah but more Ah/buck
2016-01-15 10:40 <arossdotme-planb> or kyak was accidental tab auto complete was meant to be k thanks whitequark :)
2016-01-15 10:41 <arossdotme-planb> thx DocScrutinizer05
2016-01-15 10:41 <DocScrutinizer05> yw
2016-01-15 10:42 <DocScrutinizer05> ""Buy 540 times for €3.29 "" ;-)
2016-01-15 10:43 <DocScrutinizer05> ~540*3.4*3.7
2016-01-15 10:43 <infobot> 6793.200000000001
2016-01-15 10:43 <DocScrutinizer05> 6.8kWh
2016-01-15 10:43 <arossdotme-planb> :)
2016-01-15 10:43 <DocScrutinizer05> ~540*3.29
2016-01-15 10:43 <infobot> 1776.6
2016-01-15 10:44 <DocScrutinizer05> EUR
2016-01-15 10:44 <arossdotme-planb> :o
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2016-01-15 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
2016-01-15 11:01 <DocScrutinizer05> those above are high capacity cells with only 2C (max 6A) discharge
2016-01-15 11:03 <DocScrutinizer05> for RC etc you can get 10C or even 30C cells
2016-01-15 11:04 <DocScrutinizer05> those have less chemistry for energy storing and more metal in the electrodes for high current
2016-01-15 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
2016-01-15 11:04 <arossdotme-planb> *lighter weight
2016-01-15 11:06 <arossdotme-planb> hmm
2016-01-15 11:06 <arossdotme-planb> my car 14v 4x45w class d amp has a 15amp fuse....
2016-01-15 11:06 <DocScrutinizer05> 5S2P, 10 cells, should do
2016-01-15 11:07 <DocScrutinizer05> ~4*45/12
2016-01-15 11:07 <infobot> 15
2016-01-15 11:07 <arossdotme-planb> :)
2016-01-15 11:07 <DocScrutinizer05> ~5*3.6
2016-01-15 11:07 <infobot> 18
2016-01-15 11:08 <DocScrutinizer05> ~5*4.2
2016-01-15 11:08 <infobot> 21
2016-01-15 11:10 <DocScrutinizer05> wait, "... other use was a 14.8v min batt pack..."   " (19-24V*3A in)"  ??
2016-01-15 11:12 <DocScrutinizer05> 5S2P can deliver 18V * 2C * 2(parallel)
2016-01-15 11:12 <DocScrutinizer05> ~18*7.2*2
2016-01-15 11:12 <infobot> 259.2
2016-01-15 11:12 <DocScrutinizer05> Watt
2016-01-15 11:13 <DocScrutinizer05> at that rate, the pack is depleted after nominal 30 minutes, RL 15 minutes
2016-01-15 11:16 <DocScrutinizer05> never forget about balancing for Series packs!
2016-01-15 11:17 <DocScrutinizer05> both during charging and for monitoring discharge end voltage
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2016-01-15 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)?
2016-01-15 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.
2016-01-15 18:27 <arossdotme-planb> i hope/guess there’s less risk using the Panasonic 3400mah cells as i would need less of them.
2016-01-15 18:27 <whitequark> get protected cells, then you don't have to care when discharging
2016-01-15 18:28 <whitequark> as the protection circuit will disconnect any cell with undervoltage condition
2016-01-15 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
2016-01-15 18:29 <arossdotme-planb> whitequark, oh yea, your right. hu i was looking at the protected ones available at nkon
2016-01-15 18:29 <arossdotme-planb> double the price though
2016-01-15 18:29 <arossdotme-planb> better than death :)
2016-01-15 18:30 <whitequark> they're still very cheap
2016-01-15 18:31 <arossdotme-planb> battery holders https://www.thingiverse.com/thing:456900/#comments
2016-01-15 18:32 <arossdotme-planb> the better diy usb pwr banks have cell monitoring http://www.gearbest.com/chargers/pp_246290.html
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2016-01-15 18:39 <whitequark> ha, that holder design is pretty great
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2016-01-15 18:59 <arossdotme-planb> yea it is
2016-01-15 19:00 <arossdotme-planb> ant tried it.... but looks good
2016-01-15 19:00 <arossdotme-planb> my bad, nkon are 3x the price for protected. china was 2x
2016-01-15 19:01 <arossdotme-planb> dam
2016-01-15 19:02 <arossdotme-planb> maybe i can find a nice protection board for less money that will do the same job
2016-01-15 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
2016-01-15 19:07 <arossdotme-planb> (19-24V*3A in)=power input for my smaller power audio amplifier
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2016-01-15 23:26 <arossdotme-planb> just read up on S and P. yea 5S2P or 4S2P im think. maybe upto 4P :D depending on cost
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2016-01-15 23:33 <arossdotme-planb> wondering about rc packs again
2016-01-15 23:33 <arossdotme-planb> while 6c i think will be enough for most things for somethings 12C or more probably would be better
2016-01-15 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
2016-01-15 23:34 <arossdotme-planb> so if its really bassy music
2016-01-15 23:34 <arossdotme-planb> it needs lots of current
2016-01-15 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
2016-01-15 23:36 <arossdotme-planb> ping
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