RCCrawler Forums

fanke19 · 03-31-2010, 10:08 AM

So, I was given a battery to use for my crawler...but not sure that it will be able to handle the load...any input?

http://www.venom-group.com/mmVENOMGR...15000-Icon.jpg

Specifications:

Battery Type: Lithium Polymer (LiPO)
Configuration: 2s1p
Weight: 3.5 oz.
Dimensions: 18.2 x 30 x 91mm
Charge Rate: .5C (1.2A)
Continuous Discharge: 0.5C (1.2A)
Min Discharge Volts Per Pack: 6V
Max Burst Rate: 1.5C (3.6A)
Max Volts Per Cell: 4.2V
Max Volts Per Pack: 8.4V

Blood_Clod · 03-31-2010, 10:15 AM

You'll be fine.

Crawlers don't draw much at all.

I run a Thunder Power 910mah 15c reciever power pack in my TLT comp truck works great. I think that pack only has 20 guage wire (small) on it like this Venom pack.

Lorents · 03-31-2010, 11:28 AM

Quote:

Continuous Discharge: 0.5C (1.2A)

If this is correct it wont deliver enough power for anything much bigger than a micro... at best a MRC.

Blood_Clod · 03-31-2010, 11:39 AM

Quote:

Originally Posted by Lorents

If this is correct it wont deliver enough power for anything much bigger than a micro... at best a MRC.

I didn't catch that. I find that hard to believe only 1.5A cont!! AA's discharge more than that.

It's free, run it!

Lorents · 03-31-2010, 11:53 AM

Quote:

I find that hard to believe only 1.5A cont!! AA's discharge more than that.

Same here, never heard about a lipo that only delivers 0.5C. The low rating could be because of the thin power wire and servo plug? If so the lipo could work fine if they where replaced by beefier stuff

fanke19 · 03-31-2010, 11:57 AM

Quote:

Originally Posted by Blood_Clod

...It's free, run it!...

I was thinking the same thing...just thought I'd see what the pro's had to say.

Quick sub-question though...when I switch the plug over to deans and finally run this in the crawler...will it be damaged by attempting to pull more out of it than it was designed to deliver? Or will it not hurt the battery, and simply not deliver much performance?

You'll have to excuse me...I'm an electricity newbie...but I'm starting in the fall on my route to an electronics technician job...so hopefully I won't be dumb for long

Lorents · 03-31-2010, 12:03 PM

Just run it for a few minutes and check to see if it gets hot. If it gets hot it means that your esc is taking too much out of it and the lipo could be in danger of getting damaged. If it runs cool (or even warm'ish) you should be ok but keep an eye on the temp until you know if it works.

Let us know how it performs

fanke19 · 03-31-2010, 12:06 PM

Sounds good...will do...

indiana mudcat · 03-31-2010, 12:08 PM

That battery's not even strong enough to power a servo, much less a motor. Expect it to overdraw and hit LVC as soon as you pull the throttle, if you don't have a cutoff expect fire as soon as the throttle is pulled.

Blood_Clod · 03-31-2010, 12:12 PM

Quote:

Originally Posted by indiana mudcat

That battery's not even strong enough to power a servo, much less a motor. Expect it to overdraw and hit LVC as soon as you pull the throttle, if you don't have a cutoff expect fire as soon as the throttle is pulled.

This is correct in Indiana Mud's statement, but I don't believe that that pack is only 0.5c that doesn't make since... I don't know.

Lorents · 03-31-2010, 12:37 PM

I guess the proof is in the pudding

Just go easy on the throttle until you get a feeling for the packs performance. If the C rating is correct your crawler should just creep along and the pack should get warm pretty fast.

PDXFNG · 03-31-2010, 01:07 PM

Be sure to record the first attempt on video and please do it outside (just in case)

I guess if the crawler goes up in flames you will at least have a cool video

NooB84 · 03-31-2010, 05:39 PM

Um, .5c?

wont work, And possibly dangerous to use.

fanke19 · 03-31-2010, 10:13 PM

Ok, now I MUST try it.

I will be sure to have the video camera on hand. Youtube here I come!

Sine Deviance · 04-08-2010, 11:31 AM

Quote:

Originally Posted by fanke19

Ok, now I MUST try it.

I will be sure to have the video camera on hand. Youtube here I come!

I see a "Hey y'all, watch this!" moment coming

fanke19 · 04-14-2010, 07:56 AM

Well, I swapped the plug out for a Deans...and balance charged it up for the first time. I haven't run the truck on it yet (yes, a little gun shy) but I have used the battery to supply power for my lighting project that I'm trying to get nailed down in the scaler.

Maybe this weekend I'll burn this baby down

Duuuuuuuude · 04-14-2010, 09:27 AM

This is going to end badly.

Bad Attitude · 04-14-2010, 01:23 PM

I need some popcorn for this show!

fanke19 · 05-01-2010, 09:09 PM

Update: We got this truck out on the dirt hills today...and no problems whatsoever with the battery.

At first I checked the temp every few minutes during the initial easy cruising, and as time went on I drove it longer and longer without checking the temp.

After all is said and done, we drove it slow, fast, short bursts and long bursts down the driveway, and the battery stayed perfectly cool.

rcslsafut · 05-01-2010, 10:53 PM

i have not EVER heard of .5 c
i have been looking at lipo's lately real seriously to get some for my
electric truck's (especially my crawler) . 15c is as low as i have seen !!
i know thats what the info say's though . that seem's EXTREEMLY low for lipo!
thats the whole reason for lipo, more power,more amperage, more run time,
less weight.

03-31-2010, 10:08 AM	#1
fanke19 Quarry Creeper Join Date: May 2008 Location: South East Wisconsin Posts: 240	? 7.4v Lipo Rx battery to power a crawler ? So, I was given a battery to use for my crawler...but not sure that it will be able to handle the load...any input? http://www.venom-group.com/mmVENOMGR...15000-Icon.jpg Specifications: Battery Type: Lithium Polymer (LiPO) Configuration: 2s1p Weight: 3.5 oz. Dimensions: 18.2 x 30 x 91mm Charge Rate: .5C (1.2A) Continuous Discharge: 0.5C (1.2A) Min Discharge Volts Per Pack: 6V Max Burst Rate: 1.5C (3.6A) Max Volts Per Cell: 4.2V Max Volts Per Pack: 8.4V

05-01-2010, 10:53 PM	#20
rcslsafut Rock Stacker Join Date: Feb 2010 Location: american fork Posts: 52	i have not EVER heard of .5 c i have been looking at lipo's lately real seriously to get some for my electric truck's (especially my crawler) . 15c is as low as i have seen !! i know thats what the info say's though . that seem's EXTREEMLY low for lipo! thats the whole reason for lipo, more power,more amperage, more run time, less weight. Last edited by rcslsafut; 05-01-2010 at 11:31 PM.

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03-31-2010, 10:15 AM	#2
Blood_Clod Quarry Creeper Join Date: Oct 2007 Location: Ft. Wright, KY Posts: 435	You'll be fine. Crawlers don't draw much at all. I run a Thunder Power 910mah 15c reciever power pack in my TLT comp truck works great. I think that pack only has 20 guage wire (small) on it like this Venom pack.

03-31-2010, 12:03 PM	#7
Lorents Rock Stacker Join Date: Mar 2010 Location: Norway Posts: 98	Just run it for a few minutes and check to see if it gets hot. If it gets hot it means that your esc is taking too much out of it and the lipo could be in danger of getting damaged. If it runs cool (or even warm'ish) you should be ok but keep an eye on the temp until you know if it works. Let us know how it performs

03-31-2010, 12:06 PM	#8
fanke19 Quarry Creeper Join Date: May 2008 Location: South East Wisconsin Posts: 240	Sounds good...will do...

03-31-2010, 12:08 PM	#9
indiana mudcat RCC Addict Join Date: Jul 2009 Location: reelsville Posts: 1,871	That battery's not even strong enough to power a servo, much less a motor. Expect it to overdraw and hit LVC as soon as you pull the throttle, if you don't have a cutoff expect fire as soon as the throttle is pulled.

03-31-2010, 12:37 PM	#11
Lorents Rock Stacker Join Date: Mar 2010 Location: Norway Posts: 98	I guess the proof is in the pudding Just go easy on the throttle until you get a feeling for the packs performance. If the C rating is correct your crawler should just creep along and the pack should get warm pretty fast.

03-31-2010, 01:07 PM	#12
PDXFNG Pebble Pounder Join Date: Apr 2009 Location: Gresham Posts: 185	Be sure to record the first attempt on video and please do it outside (just in case) I guess if the crawler goes up in flames you will at least have a cool video

03-31-2010, 05:39 PM	#13
NooB84 Rock Stacker Join Date: Nov 2008 Location: Dearborn Posts: 65	Um, .5c? wont work, And possibly dangerous to use.

03-31-2010, 10:13 PM	#14
fanke19 Quarry Creeper Join Date: May 2008 Location: South East Wisconsin Posts: 240	Ok, now I MUST try it. I will be sure to have the video camera on hand. Youtube here I come!

04-14-2010, 07:56 AM	#16
fanke19 Quarry Creeper Join Date: May 2008 Location: South East Wisconsin Posts: 240	Well, I swapped the plug out for a Deans...and balance charged it up for the first time. I haven't run the truck on it yet (yes, a little gun shy) but I have used the battery to supply power for my lighting project that I'm trying to get nailed down in the scaler. Maybe this weekend I'll burn this baby down

04-14-2010, 09:27 AM	#17
Duuuuuuuude Suck it up! Join Date: Mar 2008 Location: Arkansas Posts: 11,652	This is going to end badly.

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04-14-2010, 01:23 PM	#18
Bad Attitude Quarry Creeper Join Date: Apr 2009 Location: KC Posts: 216	I need some popcorn for this show!

05-01-2010, 09:09 PM	#19
fanke19 Quarry Creeper Join Date: May 2008 Location: South East Wisconsin Posts: 240	Update: We got this truck out on the dirt hills today...and no problems whatsoever with the battery. At first I checked the temp every few minutes during the initial easy cruising, and as time went on I drove it longer and longer without checking the temp. After all is said and done, we drove it slow, fast, short bursts and long bursts down the driveway, and the battery stayed perfectly cool.

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