New 6volt Battery user here..  
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New 6volt Battery user here.. - 10/11/2008 3:57:56 PM   
Atlanta 60



Posts: 1139
Joined: 2/15/2003
From: Cartersville, GA, USA
Status: offline 		So I ordered my first 6v battery pack and just wanted to confirm a couple of questions..

Is a regulator necessary?? or can you just plug it in and go fly like 4.8v??

I ordered a NiMh battery but got a NiCd instead..Oh Well...But I wanted to know if conventional NiCd charging/handling practices applied to NiMh batteries also..(ie: 24hr initial charge & cycle before use..then 17 hr overnight charge as normal practice and cycle the batteries every so often)...

Can you use the same NiCd charging equipment on NiMh??

I have an Ace Digipace II cycler which has 5cell (6v) charging capability...I was planning to use that for my initial charge and first cycle...

I have JR NEC-211 wall chargers and they have a output rated at 5.8v @ 50ma...So I assume this will be alright for my "normal" 6.0v charger..Correct?? Even for the NiMh batteries??

I'm just a little skiddish as all the new battery technology has me a little baffled...Heck I've even heard of fires with the Lipo type batteries...I'd Really like to avoid all that if I can...

Thanks Allot!!

Chuck


< Message edited by Atlanta 60 -- 10/11/2008 4:14:28 PM >

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RE: New 6volt Battery user here.. - 10/11/2008 4:10:18 PM   
dhal22


 

Posts: 1517
Joined: 8/28/2006
From: Roswell, GA, USA
Status: offline 		i'm no help but thanks for starting the thread though.

david

(in reply to Atlanta 60)
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RE: New 6volt Battery user here.. - 10/11/2008 4:15:35 PM   
alcarafa


 

Posts: 292
Joined: 12/11/2006
From: Merida, Yucatan, MEXICO
Status: offline 		Hi Chuck no need for regulator, Is not recomended to charge Ni - Cad with Ni - M charger or vice versa, but maybe you can do it with the charger you have, just check if you can charge different tipes of cells, initial charge you mention would be ok.

digital servos and plane will thank you for that extra speed response .

I use only 6 v 2500 mah batteries with my Spektrum radio.

Regards.
Rafa

(in reply to Atlanta 60)
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RE: New 6volt Battery user here.. - 10/11/2008 5:12:22 PM   
ual767



Posts: 782
Joined: 12/3/2002
From: Chantilly, VA, USA
Status: offline 		A regulator will give you more consistent performance (speed) from your servos. Otherwise, servo speed will change as voltage changes as the battery goes down. Ni-cd wall changers will charge a ni-mh but be careful with fast chargers. Ni-mh has a different peak pattern (more subtle) than ni-cd and some of the cheaper fast chargers sometimes will miss the peak on ni-mh and overcharge the battery to the point of failure. Been there. Ni-mh also have higher self discharge rates sitting around than ni-cd cells and you need to be sure that you get good quality ni-mh cells. Cheapie cells sometimes have higher internal resistance and lose voltage under load more than a better quality cell.

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RE: New 6volt Battery user here.. - 10/11/2008 5:22:04 PM   
Taurus Flyer



Posts: 551
Joined: 1/9/2004
From: Almelo, NETHERLANDS
Status: online 		Hello Chuck,

I have some troubles with this part of your post:
>>>
I have JR NEC-211 wall chargers and they have a output rated at 5.8v @ 50ma...So I assume this will be alright for my "normal" 6.0v charger..Correct?? Even for the NiMh batteries??
>>>

The output voltage must have overvoltage to charge the battery,
I think your charger is for 4 cells, 4 x 1,45 V = 5,8 Volt.
Overvoltge is 1,45 - 1,11 = 0,34 Volt/cell empty pack , 1,45 - 1,3 = 0,15 Volt/cell full pack.

When you try to charge a 6 Volt battery you must check the current on moment of start charging but especially after about 14 hours, because maybe the chargecurrent is zero because of the voltage of the battery pack.
Overvoltage 1,16 - 1.11 = 0.06 Volt/cell??? empty pack, 1,16 - 1,3 = ##### Volt/cell

When this is not clear, ask again.

Cees

< Message edited by Taurus Flyer -- 10/11/2008 5:36:03 PM >

(in reply to Atlanta 60)
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RE: New 6volt Battery user here.. - 10/11/2008 5:35:51 PM   
dhal22


 

Posts: 1517
Joined: 8/28/2006
From: Roswell, GA, USA
Status: offline 		i think he realizes that the 5.8 volt charger won't charge to 6 volts.

david

(in reply to Taurus Flyer)
       Post #: 6

RE: New 6volt Battery user here.. - 10/11/2008 5:41:40 PM   
Taurus Flyer



Posts: 551
Joined: 1/9/2004
From: Almelo, NETHERLANDS
Status: online 		Hello David,

Do I misunderstand the situation?
I thought Chuck does want to use the 5,8 Volt 50 mA charger to charge the 6 V pack in 14 hour charging cyclus.
(BTW 14 hour 50 mA you have 500 mAh in a 4 cell 4,8 V pack.)

Cees

< Message edited by Taurus Flyer -- 10/11/2008 5:58:56 PM >

(in reply to dhal22)
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RE: New 6volt Battery user here.. - 10/11/2008 6:53:41 PM   
Atlanta 60



Posts: 1139
Joined: 2/15/2003
From: Cartersville, GA, USA
Status: offline
quote:

ORIGINAL: Taurus Flyer

Hello David,

Do I misunderstand the situation?
I thought Chuck does want to use the 5,8 Volt 50 mA charger to charge the 6 V pack in 14 hour charging cyclus.
(BTW 14 hour 50 mA you have 500 mAh in a 4 cell 4,8 V pack.)

Cees


I did but I see now it will not work...I need the JR NES-222 charger which has an RX rating of 150 mA...

Thanks everybody for the input!!

Chuck

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(in reply to Taurus Flyer)
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RE: New 6volt Battery user here.. - 10/11/2008 9:42:03 PM   
pimmnz


 

Posts: 559
Joined: 11/9/2005
From: Auckland, NEW ZEALAND
Status: offline 		No Chuck, you will need a 6 volt charger, a 4.8 volt wall charger cannot fully charge a 6 volt pack. Ma's are not relevant, other than how long it will take to charge, but a 4.8 volt charger will leave you 6 volt pack seriously undercharged no matter how long you leave it on.
Evan.

(in reply to Atlanta 60)
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RE: New 6volt Battery user here.. - 10/11/2008 10:48:48 PM   
dhal22


 

Posts: 1517
Joined: 8/28/2006
From: Roswell, GA, USA
Status: offline 		how do servos react to a 6 volt battery that is only charged to 5.8 or 4.8 volts?

david

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RE: New 6volt Battery user here.. - 10/11/2008 10:49:20 PM   
PatternPilot



Posts: 549
Joined: 11/17/2002
From: Knoxville, TN, USA
Status: offline 		shoot if your going thru all that problem of cahrges and the cost of a 6 volt battery and increased weight, you should have gone to a 2 cell 7.4 lipo battery.. I run mine thru a 6 volt regulator and fly 14 flights on a 780 mah pack. Yes they are all high speed, high torque servos.. This is a nice systyem and charging is done in 45 minutes at 1c.. The pack is a 25c discharge.

Just another way and a whole lot lighter in weight and most likely cheaper if you already have a lipo charger.

Scott
SPA 239
www.rcfoamy.com

(in reply to Atlanta 60)
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RE: New 6volt Battery user here.. - 10/12/2008 1:22:20 AM   
Atlanta 60



Posts: 1139
Joined: 2/15/2003
From: Cartersville, GA, USA
Status: offline
quote:

ORIGINAL: PatternPilot

shoot if your going thru all that problem of cahrges and the cost of a 6 volt battery and increased weight, you should have gone to a 2 cell 7.4 lipo battery.. I run mine thru a 6 volt regulator and fly 14 flights on a 780 mah pack. Yes they are all high speed, high torque servos.. This is a nice systyem and charging is done in 45 minutes at 1c.. The pack is a 25c discharge.

Just another way and a whole lot lighter in weight and most likely cheaper if you already have a lipo charger.

Scott
SPA 239
www.rcfoamy.com


See...Your "Speaking Greek" to me...I don't understand all that Li-Po stuff and quite frankly I'm skeered of it...It's tough to teach an Old Dog New Tricks...

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RE: New 6volt Battery user here.. - 10/12/2008 1:40:37 AM   
rv7driver


 

Posts: 245
Joined: 10/26/2003
From: Dallas, GA, USA
Status: offline 		Chuck, if your using the 6 volt Battery on a Pattern plane yes you want to use a regulator, the servo's flucuation in the speed of the servo will be the same ie voltage drop and rise. This might sound crazy but it works I know I use it and love it in all my pattern planes.
Go to www.cheapbatteries.com they have a great explanation of what you are asking about. DON'T LET THE NAME TURN YOU OFF THEY HAVE GREAT STUFF AND BATTERY INFO. I hope this helps. I use NIMI's and have a battery charger for all types of batteries can be programed for any voltage, there are a number of chargers to choose from. PS: if using Nimi batteries you need to FORM the battery. Discharge @ a slow rate charge back up ( cycling the battery) I do this 3 times before I even put them in the plane for the first time. Then you can Quick charge with no problem.

Pete

< Message edited by rv7driver -- 10/12/2008 5:16:46 PM >

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RE: New 6volt Battery user here.. - 10/12/2008 11:22:55 AM   
Taurus Flyer



Posts: 551
Joined: 1/9/2004
From: Almelo, NETHERLANDS
Status: online 		Chuck.

Your last post:
>>>
See...Your "Speaking Greek" to me...I don't understand all that Li-Po stuff and quite frankly I'm skeered of it...It's tough to teach an Old Dog New Tricks...
>>>
Do not worry, there’s hope.

I am also an old dog and do not use that wallet empting Li-Po stuff.

I did forget an important warning in my messages for you and maybe you did know but, if not, I hope I am not too late.
I also do not know your way of first charging and the result of that but I found it too important.

Normally a new Nicad pack does have his optimum capacity after about 6 times of charging and discharge, so do discharge the battery one time, (before last loading of course)to check the capacity and to avoid an electrical dead-stick.

I use a homemade discharge timer, discharging the pack with 200 mA until 1,11 V/cell so 4,44 V. (for me the capacity is, hours x 200 mA).
I often discharge my battery pack of the plane after a flying day to know the rest capacity. It is normally more than 50% left in the pack. This is my way of double check.
Charging I always do with 1/10 cap load current just you do, for more than 40 years now!(no the principle, not the loading time!!!st...d) I will never change that.

BTW: "REMOVE BEFORE FLIGHT" label/plug discomnnects the retract servo during servicing and starting the engine! To avoid a belly landing before take-off!


Cees


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