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HomeAircraftHelicopterMain Discussion › Question about LiFe batteries
03-16-2015 12:48 PM  3 years agoPost 1
Dan Minick

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Columbus, WI

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Over the past few years my 12v lead batteries on my fuel pumps have been getting weaker and weaker. I am looking to upgrade them to something with a little more pop. What I like about lead acid is that there is no penalty for leaving them charged all the time and I do not mind the weight. I see a lot of guys using 3s lipo which is great but then I have another pack to store and charge each time I want to go flying. How does the LiFe chemistry work exactly? Is there long term penalty's for leaving them charged? Will I ruin them?

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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03-16-2015 01:04 PM  3 years agoPost 2
don s

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Chesapeake, VA

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I vote no penalty.

E820, Raptor G4N, X50F/E, E620, Forza 450, and some planks.

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03-16-2015 01:05 PM  3 years agoPost 3
fastflyer20

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N. Tonawanda, NY

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LiFe can stay charged without penalty and do not loose much charge over time. They will not have the Pop of a lipo.

I don't worry about the lipos used for refueling, the IR goes up slightly if they stay charged but it does not matter much to turn the pump over.
Same goes for starter LiPo's the extra pop is worth it and packs still last a few years or more.

Tom
CAUTION - my posts are based on my experiences, yours may be different.

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03-16-2015 02:14 PM  3 years agoPost 4
Four Stroker

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Atlanta

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Most people use old tired LiPo's for pumps and starters. If your pump or starter shorts out in your flight box, your car or house burns up.

I personally know three guys who have burned up their garages.

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03-16-2015 02:15 PM  3 years agoPost 5
JasonJ

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North Idaho

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I had put a very used 3s lipo in my align starter in 09. That thing was left mostly charged most of the time. I finally replaced it a few months ago. You can use a lipo for your fuel pump no problem. Or, use a LiFe batt, it can stay charged with no issues.

As far as the above post, any battery chemistry shorting out can cause a fire so common sense and care should be taken when storing your equipment.

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03-16-2015 02:55 PM  3 years agoPost 6
Ace Dude

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USA

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When it comes to LiFe batteries the genuine A123 ~2600mAh cells are extremely durable in terms of leaving them stored fully charged, over discharging, and fast charging. Other LiFe brands may not be as durable.

  

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03-16-2015 03:18 PM  3 years agoPost 7
JEEPWORLD2002/2

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Blue Bell, Pa

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I use a old true rc 4s lipo was fully charged four years ago n gas dropped .40 v p/cell still good enough to power my danatron only used for starter n lady year I switched over my lead to 3s lipo which I don't store either most fires happen upon charging or discharging no sitting long times charged yes if you short them yes they cook but not sitting idle. No fear worse case unplug the dean connection from the item your powering

Trex600n,Trex500,MR25,MikadoLoGo5003d/KDE,Goblin 380XNova,CastleCreations,Ys,JR XG8,Tags Mini XBus Dmss//FAA# FA3NYC9TAP

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03-16-2015 03:49 PM  3 years agoPost 8
Kevin Dalrymple

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Indianapolis

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Most people use old tired LiPo's for pumps and starters
I just use old 3S lipo. I leave it charged up, and you will know when I starts to go dead. Charge again. nothing lost as it is a bad lipo for flying anyway. If you need to by a lipo use a RX lipo. the C rating is lower and not as expensive.

I disconnect my lipos when I am done for the day. Never had a problem.

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03-16-2015 05:03 PM  3 years agoPost 9
Tyler

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Chicagoland area

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I also use old lipos, even puffed lipos. My pump battery is 7 years old at least. Charge when needed. Don't store any lipos where a fire is problematic, period! Any battery can ignite. Plan accordingly.

Enjoy things that money can buy IF you don't lose the things money can't buy.

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03-16-2015 09:03 PM  3 years agoPost 10
AirWolfRC

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42½ N, 83½ W

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Have you thought about a mechanical pump ?

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03-16-2015 11:04 PM  3 years agoPost 11
Dan Minick

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Columbus, WI

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Thanks for the reply guys. To answer a few questions and clear things up.

Fastflyer- by pop I mean a little more life than my old lead acid. No need for a full power climb out My bad on the wording, my batts now only charge to between 10-11v and they don't pump much fuel before they drop much further.

Four stroker- I use an old 4s 10,000 pack I had for offroad on my dynatron charge it twice a year. But it is a good quality battery I trust. I dont want to drop a ton of cash on a big lipo then have to do more work and worry about it. Buying cheap packs is not in my DNA

Ace- 3-4s something with higher capacity was my plan I have not done a ton of searching yet but I would like at least 5000mah maybe some of those 2600 packs in a series

Airwolf- No, I have an old Boxxer I am very happy with. Wish I could find another for my kero tank. I fly by myself 99% of the time and a day at the field I can eat a gallon of nitro and 2 gallons of kero easily. I want to be flying not cranking. I can see if you fly at a field and someone to shoot the sh!T with its a little more enticing. Not for me

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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03-17-2015 12:08 AM  3 years agoPost 12
Dan Minick

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Columbus, WI

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OK, so now here is my next question. Where is the bast place to get A123 cells/packs?

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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03-17-2015 12:43 AM  3 years agoPost 13
kl0rg

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Ketchikan,AK US

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I get my RX LiFe packs from these guys: http://www.buddyrc.com/
Have been happy so far.

Citizen #45

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03-17-2015 02:22 AM  3 years agoPost 14
jharkin

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Holliston, MA - USA

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When it comes to LiFe batteries the genuine A123 ~2600mAh cells are extremely durable in terms of leaving them stored fully charged, over discharging, and fast charging. Other LiFe brands may not be as durable.
+1, they also have very high C rates and can push some serious current. Just MHO but I suspect this idea that LiFe are weak comes from all the off-brand low current clones marketed only to be RX packs (i.e. LiFesource).

-Jeremy
Whiplash-G
Helix 700G
T-Rex 450 fbl conversion
alot of planks

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03-17-2015 02:53 AM  3 years agoPost 15
turboomni

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East of the Equator

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I remember a few years ago guys that put a dedicated life packs in their 450's . Never removed the pack to charge . But charged them very quickly. They are heavier but some guys prefered them to the lipos of the time.

Setup is everything, All my heli's can fly far better than I can pilot them

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03-17-2015 04:33 AM  3 years agoPost 16
Tyler

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Chicagoland area

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LiFe batteries lost steam in the competition with lipos because of the added weight associated with the steel can enclosures and relatively small capacity (2300mah and 1100mah). The only way to achieve large capacities was adding more cells, which meant lugging around more metal containers. The weight killed the benefits.

Sack packaged Life batteries are not as robust, forgiving, and are rated for much lower charge/discharge values.

They can be charged in a hurry and take abusive discharges.

Enjoy things that money can buy IF you don't lose the things money can't buy.

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03-17-2015 11:58 PM  3 years agoPost 17
Dan Minick

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Columbus, WI

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Jeeze guys the best price on a 5000 mah 4s pack is 180$ that is STEEP. Maybe another lead acid is in my future

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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03-18-2015 12:31 AM  3 years agoPost 18
JEEPWORLD2002/2

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Blue Bell, Pa

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No way u need. A 5000 1600-2000 will do u fine with charging a glo plug or running a plug , running a starter will use 12v2000 mah , n running a gas pump is no wattage so y would u price a 5000 and 20 c should be plenty with a 2000. Look at a

Trex600n,Trex500,MR25,MikadoLoGo5003d/KDE,Goblin 380XNova,CastleCreations,Ys,JR XG8,Tags Mini XBus Dmss//FAA# FA3NYC9TAP

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03-18-2015 04:02 AM  3 years agoPost 19
Dan Minick

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Columbus, WI

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Even a 2500 4s pack is 70-90$. I can buy almost 5-7 lead batts for that with twice the capacity.

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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03-19-2015 01:55 AM  3 years agoPost 20
Four Stroker

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Atlanta

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If you want a lead acid battery, then buy a lead acid battery.

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