Cox Engines Forum
You are not logged in! Please login or register! Guests are limited to posting in the "General Questions (Guest Posting Allowed)" section only. Becoming a member is fast, easy and FREE!


Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Latest topics
» Question re. Helldiver fuel tank
by Cox International Today at 10:49 am

» ebay Cox Mercedes, rough.....but check out that glow head.
by rsv1cox Today at 10:43 am

» Medallion .049
by Levent Suberk Today at 8:58 am

» Brodak 1/2A Flite Streak getting busy
by Ken Cook Today at 4:27 am

» cox recoil cord
by 944_Jim Yesterday at 8:43 pm

» Diy tanks in MS
by Ken Cook Yesterday at 7:51 pm

» Cameron .19 Marine Engine
by Ken Cook Yesterday at 7:45 pm

» treaded rod 5-40
by 944_Jim Yesterday at 6:26 pm

» CEF Honors All Who Served
by GallopingGhostler Yesterday at 5:18 pm

» Off topic - Tire pressure monitoring system
by GallopingGhostler Yesterday at 4:57 pm

Cox Engine of The Month
October-2018
Mudhen's

"Prototype T.D. .010 c.1960"



PAST WINNERS
Speed Contest 2018
CEF Traveling Engine

Win This Engine!
The Traveling Prop
Gallery


World of Aviation

4.8v nimh 1000 mah charger , Trade??

Go down

Trade 4.8v nimh 1000 mah charger , Trade??

Post  getback on Fri Oct 02, 2015 7:11 pm

Got the J plug receiver Battery and need a charger don't need to bee expensive just needs to work , May can work a trade if you are  looking or just need something I have . Thanks , Eric Small Cox Logo


Last edited by Admin on Wed Nov 11, 2015 5:39 pm; edited 2 times in total (Reason for editing : plug type)
avatar
getback
Top Poster
Top Poster

Posts : 5065
Join date : 2013-01-18
Age : 61
Location : julian

View user profile

Back to top Go down

Trade Re: 4.8v nimh 1000 mah charger , Trade??

Post  pkrankow on Fri Oct 02, 2015 7:46 pm

Do you fly electric? Flight pack battery chargers can usually be set for the desired chemistry and charge rate. Just need the right adapter.

Phil
avatar
pkrankow
Diamond Member
Diamond Member

Posts : 2967
Join date : 2012-10-02
Location : Ohio

View user profile

Back to top Go down

Trade Re: 4.8v nimh 1000 mah charger , Trade??

Post  getback on Fri Oct 02, 2015 8:15 pm

No elect so far , I tried to charge this batt. with old NiCad charger and they never even got warm after hrs.
avatar
getback
Top Poster
Top Poster

Posts : 5065
Join date : 2013-01-18
Age : 61
Location : julian

View user profile

Back to top Go down

Trade ????? I don't understand

Post  happydad on Sat Oct 03, 2015 1:57 am

getback wrote:No elect so far , I tried to charge this batt. with old NiCad charger and they never even got warm after hrs.

Then why do you need a new charger? did the NiMh batteries get charged? did they get hot? no. all is good. All you need to do is watch the charge current and the charge time. Charge current typically is battery capacity divided by 10 and charge time is typically battery capacity divided by charge current + 10%. The NiMh settle in voltage, reach a maximum, then go down slightly, when fully charged. NiCd are more rugged, but less capacity per cubic inch of battery. Please don't spend $30.00 to $50.00 to charge 4 cells to 6.00 volts. Futaba recommended charging them at 30 mAhr with 8 volt source for 16 hours, the 4 AA cell 450 mAhr battery packs they used to sell with their receivers, (16 X .03 mAhr = .48 Ahr or 480 mAhr just over the 450 mAhr rating).
  You can buy an adequate charger for less than $10.00, a great charger for $20.00, one with AC plug. I have purchased Chargers for my Lithium batteries for only $3.50, they needed a DC source of course. I have AC-DC chargers from the old electric car days when they had timers on them to keep the high current charges, 6 Amp., from overheating the old NiCd batteries. Some of the NiCd batteries were not made to take that fast a charge. The newer RC car batteries, non-LiPo, can handle high current charges, who wants to wait 16 hours to run the car again. I use the High Current DC supply to supply voltage and High Current to my batteries and the new cheap Chinese $3.50 charge limiter controls the battery voltage and detects when it reaches it's peak and shuts the charge down to a trickle letting the battery cool down.
   PM me for more info.

happydad RC Plane Jeep
avatar
happydad
Platinum Member
Platinum Member

I Support My Forum

Posts : 1158
Join date : 2012-05-28
Age : 73
Location : Escondido, CA

View user profile

Back to top Go down

Trade Re: 4.8v nimh 1000 mah charger , Trade??

Post  getback on Sat Oct 03, 2015 7:59 am

Thanks happydad I used an old futaba charger I don't have my meter up at the house but plugged it in to the plane and it works ! I had charger both receiver and transmitter for 16 Hrs. unfortunately I had the transmitter ON and it didn't take a charge I think it took form it as its dead now so I put it back on charge . I will check it later I don't have much $ to spend that's why I was asking if any one had to trade ? I looked at some the ones that work with a/c V but if I don't need it i'll hold off for now . I don't understand all this voltage change stuff Huh... Eric Shocked
avatar
getback
Top Poster
Top Poster

Posts : 5065
Join date : 2013-01-18
Age : 61
Location : julian

View user profile

Back to top Go down

Trade Re: 4.8v nimh 1000 mah charger , Trade??

Post  pkrankow on Sat Oct 03, 2015 9:25 am

I use a lot of NiMH batteries around the house with 2 kids. My fast charger is acting up, which might be a number of reasons, so I was reading up on the technology. I think I need to slow charge a couple cycles, and I think my fast charger is built for older lower capacity batteries than I have been using in it.

http://www.powerstream.com/NiMH.htm
a fair part of this page is relevant, specifically the low rate charging.

Phil
avatar
pkrankow
Diamond Member
Diamond Member

Posts : 2967
Join date : 2012-10-02
Location : Ohio

View user profile

Back to top Go down

Trade Re: 4.8v nimh 1000 mah charger , Trade??

Post  happydad on Sat Oct 03, 2015 2:58 pm

pkrankow wrote:I use a lot of NiMH batteries around the house with 2 kids.  My fast charger is acting up, which might be a number of reasons, so I was reading up on the technology.  I think I need to slow charge a couple cycles, and I think my fast charger is built for older lower capacity batteries than I have been using in it.

http://www.powerstream.com/NiMH.htm
a fair part of this page is relevant, specifically the low rate charging.

Phil

Thanks for the article. I hope members read it. Some batteries can take fast charge and some can't. Some of the newer consumer batteries are made for less and less recharge cycles. WHY? So you will buy more batteries. Try to buy the industrial use batteries. They are built to last longer, and take more recharge cycles. If the battery says 100 recharge cycles, use it the toss it. If you try to push the battery to 150 cycles sometimes you can have a shorted or dead battery, and that can be bad in an industrial environment. For the average consumer, you just toss it, I mean recycle it by toss it.

Two Cents Two Cents Two Cents  Happydad RC Plane
avatar
happydad
Platinum Member
Platinum Member

I Support My Forum

Posts : 1158
Join date : 2012-05-28
Age : 73
Location : Escondido, CA

View user profile

Back to top Go down

Trade Re: 4.8v nimh 1000 mah charger , Trade??

Post  akjgardner on Sat Oct 03, 2015 5:52 pm

getback wrote:No elect so far , I tried to charge this batt. with old NiCad charger and they never even got warm after hrs.
I sent you a PM
avatar
akjgardner
Platinum Member
Platinum Member

Posts : 802
Join date : 2014-12-28
Age : 59
Location : Milan Indiana

View user profile

Back to top Go down

Trade Re: 4.8v nimh 1000 mah charger , Trade??

Post  NEW222 on Sat Oct 03, 2015 6:55 pm

I can have a look if you so need one. If so, would you need the standard Futaba charger that does Tx and Rx?
avatar
NEW222
Diamond Member
Diamond Member

Posts : 1515
Join date : 2011-08-13
Age : 40
Location : oakbank, mb

View user profile

Back to top Go down

Trade Re: 4.8v nimh 1000 mah charger , Trade??

Post  Sponsored content


Sponsored content


Back to top Go down

Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum