Forums

Charger recommendations

Started by Andy January 1, 2018
I am looking at the Nitecore D4 Digicharger/Four Channel Universal Smart Battery Charger/LCD Display and GYRFALCON All-44 4 Channel Digital Battery Charger.

What do you recommend ?

I read where 26650 have a higher capacity than 18650s.

Andy
On Mon, 1 Jan 2018 09:56:36 -0800 (PST), Andy
<andrewkennedy775@gmail.com> wrote:
>I am looking at the Nitecore D4 Digicharger/Four Channel >Universal Smart Battery Charger/LCD Display and GYRFALCON >All-44 4 Channel Digital Battery Charger. >What do you recommend ?
"IMAX B6AC V2 Professional Balance Charger/Discharger (US Plug)" <https://hobbyking.com/en_us/imax-b6ac-v2-professional-balance-charger-discharger.html> $44 for the built in 117VAC version or: <https://hobbyking.com/en_us/imax-b6-50w-5a-charger-discharger-1-6-cells-genuine.html> $29 for the 12V DC input version. I have one of these. It's basically a fairly universal programmable charger that can do almost anything. If you're building a series wires battery arrangement, you add a JST-XH "balance charger" wiring connector <https://hobbyking.com/en_us/catalogsearch/result/?erp_category=&q=JST-XH> and you can safely charge LiIon cells in series. For high current, use XT-60 connectors: <https://www.google.com/search?q=xt-60+connector&tbm=isch> I haven't used either of the chargers you mentioned, so I can't offer an opinion.
>I read where 26650 have a higher capacity than 18650s.
Yep. <https://en.wikipedia.org/wiki/List_of_battery_sizes#List_of_Li-ion_sizes> 18650 1500 - 3600 ma-hr 26650 3300 - 5200 ma-hr I'm still waiting for you to disclose the maker and model of your tail light so I can calculate runtime for various batteries. -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558
On Mon, 1 Jan 2018 09:56:36 -0800 (PST), Andy
<andrewkennedy775@gmail.com> wrote:

>I am looking at the Nitecore D4 Digicharger/Four Channel Universal Smart Battery Charger/LCD Display and GYRFALCON All-44 4 Channel Digital Battery Charger. > >What do you recommend ? > >I read where 26650 have a higher capacity than 18650s.
The 26650 is twice the size of the 18650, so sure, it _should_ have a higher capacity.
On Monday, January 1, 2018 at 12:34:03 PM UTC-6, Jeff Liebermann wrote:
> On Mon, 1 Jan 2018 09:56:36 -0800 (PST), Andy > <andrewkennedy775@gmail.com> wrote: > >I am looking at the Nitecore D4 Digicharger/Four Channel > >Universal Smart Battery Charger/LCD Display and GYRFALCON > >All-44 4 Channel Digital Battery Charger. > >What do you recommend ? > > "IMAX B6AC V2 Professional Balance Charger/Discharger (US Plug)" > <https://hobbyking.com/en_us/imax-b6ac-v2-professional-balance-charger-discharger.html> > $44 for the built in 117VAC version or: > <https://hobbyking.com/en_us/imax-b6-50w-5a-charger-discharger-1-6-cells-genuine.html> > $29 for the 12V DC input version. I have one of these. > > It's basically a fairly universal programmable charger that can do > almost anything. If you're building a series wires battery > arrangement, you add a JST-XH "balance charger" wiring connector > <https://hobbyking.com/en_us/catalogsearch/result/?erp_category=&q=JST-XH> > and you can safely charge LiIon cells in series. For high current, > use XT-60 connectors: > <https://www.google.com/search?q=xt-60+connector&tbm=isch> > > I haven't used either of the chargers you mentioned, so I can't offer > an opinion. > > >I read where 26650 have a higher capacity than 18650s. > > Yep. > <https://en.wikipedia.org/wiki/List_of_battery_sizes#List_of_Li-ion_sizes> > 18650 1500 - 3600 ma-hr > 26650 3300 - 5200 ma-hr > > I'm still waiting for you to disclose the maker and model of your tail > light so I can calculate runtime for various batteries. > > > -- > Jeff Liebermann jeffl@cruzio.com > 150 Felker St #D http://www.LearnByDestroying.com > Santa Cruz CA 95060 http://802.11junk.com > Skype: JeffLiebermann AE6KS 831-336-2558
I posted it in that thread. Here it is again. https://www.google.com/url?q=https%3A%2F%2Fwww.ebay.com%2Fitm%2FCygoLite-Hotshot-Pro-150-Lumens-LED-Bicycle-Rear-Tail-Light-USB-Rechargeable%2F322336751133%3FssPageName%3DSTRK%253AMEBIDX%253AIT%26_trksid%3Dp2060353.m2749.l2649&sa=D&sntz=1&usg=AFQjCNFvahFsxYbdsEdrerqKqtRvhTieGw Andy
On Monday, January 1, 2018 at 12:38:30 PM UTC-6, k...@notreal.com wrote:
> On Mon, 1 Jan 2018 09:56:36 -0800 (PST), Andy > <andrewkennedy775@gmail.com> wrote: > > >I am looking at the Nitecore D4 Digicharger/Four Channel Universal Smart Battery Charger/LCD Display and GYRFALCON All-44 4 Channel Digital Battery Charger. > > > >What do you recommend ? > > > >I read where 26650 have a higher capacity than 18650s. > > The 26650 is twice the size of the 18650, so sure, it _should_ have a > higher capacity.
The numbers give a rough idea of size. 18650 :- 18mm diameter, 65mm long. 26650 :- 26mm diameter, 65mm long. Hardly twice the size. Andy
"Andy" <andrewkennedy775@gmail.com> wrote in message 
news:dc9b4f18-686c-4737-ab35-f750f971acde@googlegroups.com...
> On Monday, January 1, 2018 at 12:38:30 PM UTC-6, k...@notreal.com wrote: >> On Mon, 1 Jan 2018 09:56:36 -0800 (PST), Andy >> <andrewkennedy775@gmail.com> wrote: >> >> >I am looking at the Nitecore D4 Digicharger/Four Channel Universal Smart >> >Battery Charger/LCD Display and GYRFALCON All-44 4 Channel Digital >> >Battery Charger. >> > >> >What do you recommend ? >> > >> >I read where 26650 have a higher capacity than 18650s. >> >> The 26650 is twice the size of the 18650, so sure, it _should_ have a >> higher capacity. > > The numbers give a rough idea of size. > > 18650 :- 18mm diameter, 65mm long. > > 26650 :- 26mm diameter, 65mm long. > > Hardly twice the size. > > Andy
It has more than twice the volume. 16540 mm^3 vs. 34510 mm^3
On Monday, January 1, 2018 at 1:35:20 PM UTC-6, tom wrote:
> "Andy" <andrewkennedy775@gmail.com> wrote in message > news:dc9b4f18-686c-4737-ab35-f750f971acde@googlegroups.com... > > On Monday, January 1, 2018 at 12:38:30 PM UTC-6, k...@notreal.com wrote: > >> On Mon, 1 Jan 2018 09:56:36 -0800 (PST), Andy > >> <andrewkennedy775@gmail.com> wrote: > >> > >> >I am looking at the Nitecore D4 Digicharger/Four Channel Universal Smart > >> >Battery Charger/LCD Display and GYRFALCON All-44 4 Channel Digital > >> >Battery Charger. > >> > > >> >What do you recommend ? > >> > > >> >I read where 26650 have a higher capacity than 18650s. > >> > >> The 26650 is twice the size of the 18650, so sure, it _should_ have a > >> higher capacity. > > > > The numbers give a rough idea of size. > > > > 18650 :- 18mm diameter, 65mm long. > > > > 26650 :- 26mm diameter, 65mm long. > > > > Hardly twice the size. > > > > Andy > > It has more than twice the volume. > > 16540 mm^3 vs. 34510 mm^3
That's make sense. Andy
On Monday, January 1, 2018 at 12:34:03 PM UTC-6, Jeff Liebermann wrote:
> On Mon, 1 Jan 2018 09:56:36 -0800 (PST), Andy > <andrewkennedy775@gmail.com> wrote: > >I am looking at the Nitecore D4 Digicharger/Four Channel > >Universal Smart Battery Charger/LCD Display and GYRFALCON > >All-44 4 Channel Digital Battery Charger. > >What do you recommend ? > > "IMAX B6AC V2 Professional Balance Charger/Discharger (US Plug)" > <https://hobbyking.com/en_us/imax-b6ac-v2-professional-balance-charger-discharger.html> > $44 for the built in 117VAC version or: > <https://hobbyking.com/en_us/imax-b6-50w-5a-charger-discharger-1-6-cells-genuine.html> > $29 for the 12V DC input version. I have one of these. > > It's basically a fairly universal programmable charger that can do > almost anything. If you're building a series wires battery > arrangement, you add a JST-XH "balance charger" wiring connector > <https://hobbyking.com/en_us/catalogsearch/result/?erp_category=&q=JST-XH> > and you can safely charge LiIon cells in series. For high current, > use XT-60 connectors: > <https://www.google.com/search?q=xt-60+connector&tbm=isch> > > I haven't used either of the chargers you mentioned, so I can't offer > an opinion. > > >I read where 26650 have a higher capacity than 18650s. > > Yep. > <https://en.wikipedia.org/wiki/List_of_battery_sizes#List_of_Li-ion_sizes> > 18650 1500 - 3600 ma-hr > 26650 3300 - 5200 ma-hr > > I'm still waiting for you to disclose the maker and model of your tail > light so I can calculate runtime for various batteries. > > > -- > Jeff Liebermann jeffl@cruzio.com > 150 Felker St #D http://www.LearnByDestroying.com > Santa Cruz CA 95060 http://802.11junk.com > Skype: JeffLiebermann AE6KS 831-336-2558
It looks like I will need some battery holders also ? I saw some connectors included. Andy
On 2018-01-01, Andy <andrewkennedy775@gmail.com> wrote:
> I am looking at the Nitecore D4 Digicharger/Four Channel Universal Smart Battery Charger/LCD Display and GYRFALCON All-44 4 Channel Digital Battery Charger. > > What do you recommend ? > > I read where 26650 have a higher capacity than 18650s. > > Andy
yeah, capacity is closely related to the volume occupied by the battery. the numbers indicate the size of the cell. 18650s are 18x65.0mm (18mm diameter 65mm tall) where as 26650 are 26x65.0mm, which is just over twice the volume. so with the same technology inside the 26650 should last more than twice as long. -- This email has not been checked by half-arsed antivirus software
On Mon, 1 Jan 2018 11:07:50 -0800 (PST), Andy
<andrewkennedy775@gmail.com> wrote:

>Here it is again. >https://www.ebay.com/itm/322336751133> >Andy
Thanks. I didn't see your reply: <https://cygolite.com/product/hotshot-pro-150-usb/> Two ways to grind the runtime. I could estimate the current drain based on the efficacy (lumens/watt) or I could dig for the specs. I'll do both. The box says 150 lumens output. <https://www.bikelightdatabase.com/taillights/> <https://www.bikelightdatabase.com/cygolite/hotshotpro150/> Oops, they cheated. The 150 lumens is for flashing in an unspecified mode with an unspecified duty cycle. Full max continuous output is only 90 lumens. The better LED's deliver about 100 lumens/watt. 90 lm / 100 lm/watt = 0.9 watts I'm going to ignore losses through the lens for now. Also, note that the red color is well down the from the peak sensitivity of the eye (yellow-green). The 18650 cell can produce 1500 - 3600 ma-hrs. I'll use 2000 ma-hr because I'm lazy. At an average cell voltage of about 3.6V, that's: 2.0 amp-hrs * 3.6V = 7.2 watt-hrs. The light consumes 0.9 watts, so the estimate battery life is: 7.2 / 0.9 = 8.0 hrs Actually, it's less than that because the battery cannot be fully discharged without also killing it. My guess(tm) is you'll loose about 20% of the available power resulting in: 0.8 * 8.0 hrs = 6.4 hrs Two 18650 cells in parallel will deliver twice the runtime or 12.8 hrs. Is that enough opertaing time? As usual, the manufacturers specs do not include current drain or power consumption. It does show that there are 6 modes, all of which draw less current than the full brightness needed to produce 150 lumens. The data sheet also claims that the run time is 2 to 210 hrs. Sorry, but without either some measurements or specs, I can't calculate the runtime in the other modes. If you have time, measure the duty cycle of the various other modes and max power current drain. My testing of junk 18650 cells showed and average of about 900 ma-hr. Laptop battery salvaged cells were about 1800 ma-hr. 2000 ma-hr assumes you're using brand new quality cells. If you use the two junk Ultra-Fire brand cells in your photo, you'll get about 2.7 hrs. -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558