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Muh 18650s
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2019-09-26 at 6:44 PM UTCTrying some new ones today, SANYO NCR18650GA ( Chinese manufactured.. eugh ) and new chargers - two Zanflare C4 units.
Previously was using Panasonic NCR18650B ( Japanese manufactured ) and a cheap Nitecore charger ( 500mA rate ). Unfortunately my favorite tried-and-true Panasonics are sold out in the configuration I use, Protected with raised positive terminal. The panasonic and hte sanyos are both rated around 3400mAh
These Sanyos specify a standard charging current of 1475mA and max charging temp of 113F ( 45C ). Like most other brands, my new chargers max out at 1000mA charge rate which is well under the allowable rate specified by Sanyo. I have set one charger to use 500mA rate for all slots, and the other to charge them all at 1000mA. With a current ambient temperature of just 82F ( ~28C ) , the batteries charging at 1000mA have already reached as high as 108F ( ~42C ) and those charging at 500mA as high as 100F ( 38C ). So at just moderate ambient temp the batteries charging at the higher rate are already approaching max recommended temps.
I gave my buddy all my Panasonics, wish I would have kept a few to compare charging temps, these Sanyos seem to get hotter, since ambient temps here can exceed 100F / 38C it seems inevitable that these would be charging well over temperature spec on a warm day.
Im using a IR temp gun to check the batteries, I'm not finding any chargers that incorporate temperature sensors or active cooling but it seems like they should really monitor temps and probably use active cooling for anything but the mildest charge rates. There must be a huge demand for these batteries because the Panasonic model I started buying over two years ago is still frequently out of stock and as expensive as ever. And there don't really seem to be any new highly rated models of comparable capacity from any manufacturer. -
2019-09-26 at 6:50 PM UTCI have 2 of them you can have them if you want em
Why do you want em? -
2019-09-27 at 4:44 AM UTCFor my eBong, it takes 16 lol.
First charge at 1000mA and discharged at 500mA, capacity tested at 3424, 3511, 3443, 3501mAh. Spec sheet says 3450mAh typical, 3350 minimum at 77F/25C -
2019-09-27 at 5:04 AM UTCthose are some fancy fucking chargers. I just use a Nitecore D4, but I'm guessing you do a lot more charging/discharging than me
the way lithium cells work (ie. stop discharging at ~2.7v, stop charging at ~4v) heat shouldn't be a major issue unless you're rapid-charging past 75% or soThe following users say it would be alright if the author of this post didn't die in a fire! -
2019-09-27 at 5:31 AM UTCI had been using a Nitecore D2 and 5 Panasonic NCR18650B to run my headlamp as-needed through the day, did the job just fine. Lamp takes one cell, , two in pocket case, two in charger. Change one out before lunch, the second one is good the rest of the day. Trade the used ones both for the ones off the charger when I get home.
I mostly got the new chargers because I was curious to see the charging and discharging measurements. It seemed expensive but I didn't realize it was a two pack till it arrived lol.
I'm planning on buying another of the same headlamp to use at home, so I can mirror my setups. It might be fun to play with some of the handheld lights, been looking at Nitecore Tiny Monster flashlights. What are you using your cells in? -
2019-10-13 at 10:48 AM UTC
Originally posted by aldra those are some fancy fucking chargers. I just use a Nitecore D4, but I'm guessing you do a lot more charging/discharging than me
the way lithium cells work (ie. stop discharging at ~2.7v, stop charging at ~4v) heat shouldn't be a major issue unless you're rapid-charging past 75% or so
Basically this. Do these Nitecore units provide their own wall outlet? I see so many times (mostly in the case of Apple products) where a random wall charger was used and some gas station lightning cable was used, and ultimately it burned up the Tristar IC, lightning dock connector, and/or battery that requires replacement.
I have no experience with these branded chargers and generally stay away from "multi charging stations" as I feel they are poorly made, but again, I have no experience with this brand. -
2019-10-13 at 2:02 PM UTC
Originally posted by Grimace Basically this. Do these Nitecore units provide their own wall outlet? I see so many times (mostly in the case of Apple products) where a random wall charger was used and some gas station lightning cable was used, and ultimately it burned up the Tristar IC, lightning dock connector, and/or battery that requires replacement.
I have no experience with these branded chargers and generally stay away from "multi charging stations" as I feel they are poorly made, but again, I have no experience with this brand.
the actual AC/DC transformer is built into the unit, the wall adapter is just a standard 2-prong connector. they did supply one though from memory -
2019-10-13 at 2:26 PM UTC
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2019-10-13 at 2:27 PM UTC
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2019-10-13 at 2:32 PM UTCmeth bong
