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HomeRC & PowerAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › LiFe or NIMH Reciever Packs?
04-24-2011 07:52 AM  7 years agoPost 1
rspiegel

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Austin,TX South Buda

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Ok a 2000 mAh LiFe Pack is 35$ and wieght is 145 grams(I Thinks) and 2000 mAh NIMH 6v is 25 and wieght is 152 grams. Is it worth it to go LiFe Packs? Why are they better? Im really not seeing it. When you look at Lipo the wieght is about the same. Untill you add a regulator then it is more. I ran NIMH and Lipo reciever packs and have friends that run LiFe Packs. I am in the shopping marcket for a reciever pack and may just get the same NIMH from servocity for 25$. it has worked good in my Frenzy 50 FBL setup. 3 flights to a charge. (putting back in 300 perflight) Please give me info on LiFe Packs.

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04-24-2011 10:56 AM  7 years agoPost 2
datidun

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N Ireland

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Nothing wrong with Nimh packs,i have them in all my helis,running 4.8 v,2700 mah and all my Servos are top stuff 9252 etc doing mild 3d,some guys come around with the usual lipos and all they do is continues circuits,nimh work better for me to balance out the Cg and dont want to baby sit a Battery while its charging,thats just me

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04-24-2011 12:35 PM  7 years agoPost 3
MartyH

rrProfessor

USA

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I dont see any point going to LiFe for a single flight pack. Stick to what you know. I run all Ni-MH flight packs in my helis. Generally either 2700ma for 50 size or 4000ma packs fro 90 size helis. I dont need another charger and they are VERY predictible. By the way, what voltage are you at after your 3 300ma flights?

LiFe advantages would be less prone to fire than Li-Po, flatter discharge curve than Ni-MH, extremely low self discharge and you can pull very high currents from them and put it back similarly quick.

In terms of LiFe use in a flight pack, the flatter discharge curve is probably the only real world advantage. If you are trying to fly flight after flight with very short breaks in between, then the fast charge rate might come in to play too. But if you take a break between flights and give others a chance to fly, you could keep your Ni-MH on charge between flights and fly all day too.

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04-24-2011 02:16 PM  7 years agoPost 4
AltecLansing

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North Carolina

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I use life packs now. No more regulator. Except, I'm not sure if I need a step down on the tail servo. I'll post that question in another thread.

Life packs have no memory, like nicads have. My luck with nimh packs haven't been very good resulting in quite a few crashes. It could be the brand nimhs I was using. You do need a charger that can do life packs. I won't be going back to nimhs or nicads and if I could afford it, I would set up my other helis to use life packs.

On my 2100 mah life pack, I fly it three times before I swap it for another one. I use about 900 ma after 3 flights. I have another 2300 mah life pack I fly for 3 flights also.

I have the a123 life pack with built in balancer and a life pack that I bought from tower hobbies. Of the two I like the one from tower hobbies better even though I have to use an external balancer on it.

Man, I miss the eighties.

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04-24-2011 04:16 PM  7 years agoPost 5
Thumpernator

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Senoia, Georgia, USA

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I did the switch like Altec and went with the LiFe without a regulator. But I was flying Li-Ion. I didn't use 4.8 NiMh because I wanted more peace of mind of running higher voltages to prevent possible brown-outs.

BTW Altec, I posted a question about a stepdown and was highly advised to use one unless you're using a HV tail servo.

Dave
I keep on thinking, but nothing's happening. Knuk, Knuk, Knuk

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04-24-2011 05:17 PM  7 years agoPost 6
AltecLansing

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North Carolina

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BTW Altec, I posted a question about a stepdown and was highly advised to use one unless you're using a HV tail servo.
What about the align 650 tail servos?

Man, I miss the eighties.

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04-24-2011 10:58 PM  7 years agoPost 7
rspiegel

rrVeteran

Austin,TX South Buda

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650
650 can take 6v good. I have that servo on my frenzy 50. it works.great

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04-25-2011 12:34 AM  7 years agoPost 8
Thumpernator

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Senoia, Georgia, USA

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The 650 is what I asked about. A lot of people are not using a step-down with them, but others advised to use one since the fully charged LiFe is higher than the rated voltage on that servo. I figured for $4, what the heck, run the step-down and be on the safe side. So,,,, flip a coin.

Dave
I keep on thinking, but nothing's happening. Knuk, Knuk, Knuk

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04-25-2011 01:11 AM  7 years agoPost 9
High speed pass

rrNovice

Monticello, Wis. USA

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I use the Hyperion 2100 LiFe pack. It wieghs 106 grams.
Also the voltage of a LiFe battery quickly drops off to 6.6 volts.
For this reason I do not run a stepdown on the tail servo.

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04-25-2011 10:29 AM  7 years agoPost 10
datidun

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N Ireland

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just use 4.8v when its fully charged its around 6 volts,no need for the Step down,until your a 3d Expert then go for the Pro set up

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04-25-2011 05:00 PM  7 years agoPost 11
jake21

rrApprentice

ontario canada

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Any one using 4.8 sanyo eneloop aa for reciever packs

The only way to not crash is up

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04-25-2011 06:37 PM  7 years agoPost 12
datidun

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N Ireland

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Yes Great Results,there is a new one,well new here anyway,4.8v 2500 mah XX eneloop,i get 4 to 5 flights on a pack.

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04-26-2011 03:50 PM  7 years agoPost 13
rspiegel

rrVeteran

Austin,TX South Buda

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Great
Ok got another NIMH on order 6v 2000Mha. Just wanted to see what people are running and why. I'll stay NIMH for now. Just easy to charge and stable for me. 3 flights easy then charge with FBL Total G.

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04-27-2011 12:21 AM  7 years agoPost 14
Papa Sal

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Reno, Nevada- USA

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I use the 2000 NIMH 6v with out regulator; however I do have a step down resistor on the tail= 401/DS 620. Nice!...three flights

"Everything's better inverted"

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06-26-2011 04:19 PM  7 years agoPost 15
datidun

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N Ireland

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Papa sal your servos must be 6 v rated then.

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