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« on: June 04, 2011, 12:55:07 PM »
surajhonda
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I want a 3 cell lipo battery which would be safe on a 3900kv brushless motor....i bent my old battery in a crash and now that battery is not discharging...
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« Reply #1 on: June 04, 2011, 12:58:22 PM »
Divyam
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I don't think you can use a 3 cell LiPo in a Sparrowhawk XXT..
Go for a 2cell LiPo.. Look at any LHS, or order a hardcase LiPo from Hobbyking..

I would suggest a 2s 5000MaH 40c LiPo.
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« Reply #2 on: June 04, 2011, 01:16:49 PM »
traxxrc1
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Hey, Get a 3600mah or above this time, i gave the 2200mah cz i was on budget.
Buy from HK, if u dont have Credit card, i'll order from my card. Its the cheapst and best.

Arpit
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« Reply #3 on: June 04, 2011, 01:17:57 PM »
traxxrc1
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I don't think you can use a 3 cell LiPo in a Sparrowhawk XXT..

He has been using 3s on his sparrow from the begining, so no sense for him to shift down to 2s...
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« Reply #4 on: June 04, 2011, 02:47:12 PM »
Divyam
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As far as I know, the ESC doesn't have a 3s cutoff..
Using an external BEC?
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« Reply #5 on: June 04, 2011, 03:17:31 PM »
iamahuman
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Eitherway,3s is suicide. >Cheesy
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« Reply #6 on: June 04, 2011, 03:20:39 PM »
surajhonda
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I dont know about the specs...arpit knows everything Tongue
and yea i dont have a credit card...so you plz order it for me
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« Reply #7 on: June 04, 2011, 03:23:15 PM »
surajhonda
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Y is 3s not good? It has been running good...its a ezrun bl notor n esc
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« Reply #8 on: June 04, 2011, 03:39:02 PM »
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3s is too much power.Which EZrun system is it?
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« Reply #9 on: June 04, 2011, 05:08:30 PM »
traxxrc1
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Its a 45A system, but has upto 4s LIPO COMPATIBILITY!!!!!!!!!!!!!! And thats Insane...

BTW suraj, I'll surely help you, but pls cal me after tomorrow. I am a lil busy, we can discuss more on the phone, i hope u still have my no. Cheesy

And yeah, 3s is very fine for this system, this ESC can even support a 4s Lipo, though the motor will get hotter and the car cant hold that much power. Dont worry Smiley
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« Reply #10 on: June 04, 2011, 07:52:26 PM »
Divyam
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Oh, I thought it was the stock ripper system Smiley
4s? Seems a little overkill Grin
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« Reply #11 on: June 04, 2011, 07:59:58 PM »
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4s? Seems a little overkill Grin
3s is overkill.4s in stupidity. Grin
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« Reply #12 on: June 04, 2011, 11:24:39 PM »
rajathv8
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The stock ESC can support 3s and motor uses 61 amps max at 11.1v .
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« Reply #13 on: June 05, 2011, 07:49:06 AM »
traxxrc1
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Ys Rajat, a lo of people think it cant support 3s, but it definitely can.

And BTW yeah Divyam, 4s is not a litlle , but too much of overkill...!
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« Reply #14 on: June 05, 2011, 10:09:37 AM »
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i somehow feel 2S in most cases or 4S for Dual battery setups like the Maxx and Savage to be the best combo.

3S and higher is good only for speed runs. and if u wanna get some high air while bashing  Grin
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« Reply #15 on: June 05, 2011, 10:29:07 AM »
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And some high speed crashing Cheesy
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« Reply #16 on: June 05, 2011, 10:30:29 AM »
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Yep. specifically in my case Tongue

crashed and broke 8 parts  Cry and 2 of them not in stock anywhere in india.
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« Reply #17 on: June 05, 2011, 12:16:43 PM »
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Currently im running my phoenix's 7.2v 3600mah nimh on the sparrow....it is slower and also   It runs for a short period of 15 mins...
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« Reply #18 on: June 05, 2011, 01:45:41 PM »
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Then I'd suggest a 2s LiPo.. Little more punch, for a MUCH longer time.
Word of advice, Stay AWAY from Tamiya connectors when using high power LiPos.. Had 2 of them melt Shocked

3s is insanity.. If you're used to 7.2v then 11.1v (3s) is monsterous! Shocked

EDIT| Sorry for say Traxxas, I blanked out instead of saying Tamiya Giggle
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« Reply #19 on: June 05, 2011, 01:53:50 PM »
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Just had a runwith the nimh battery on my terrace...whenever i give more than 50% throttle the car stops and the motor restarts...is it due to the high current that flows(i dont have any connectors,ive directly joined the wires of the battery to the esc after cutting them)
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« Reply #20 on: June 05, 2011, 02:50:23 PM »
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Doubt its high current. If you battery is not charged this can happen. As you use power the V drops and ESC hits cutoff. Then V increases but drops again when current is drawn.
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« Reply #21 on: June 05, 2011, 04:11:30 PM »
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But in this case the battery is full charged!!! And it happens only after half throttle...
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« Reply #22 on: June 05, 2011, 05:05:57 PM »
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Check if your Low Voltage Cutoff is on..
Was running my Slash on NiMH today, and i forgot that the LVC was on..

The car moved for 1 metre and stopped.. I got scared as hell! I thought for 2 mins, and then the problem occured to me! LVC was on!
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« Reply #23 on: June 05, 2011, 05:56:42 PM »
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The same happened to me Cheesy
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« Reply #24 on: June 05, 2011, 08:13:29 PM »
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So how do i turn it off??? I dont have a programming card for this esc!! Tongue
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« Reply #25 on: June 05, 2011, 08:30:30 PM »
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Word of advice, Stay AWAY from Traxxas connectors when using high power LiPos.. Had 2 of them melt Shocked

u serious??? any reason why?? because i used TRX connectors on the trackstar ESC and they are stock on the Maxx. No probs for me till now. can u describe what exactly happened.
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« Reply #26 on: June 05, 2011, 09:24:01 PM »
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u serious??? any reason why?? because i used TRX connectors on the trackstar ESC and they are stock on the Maxx. No probs for me till now. can u describe what exactly happened.

Sorry, I blanked out, and said Traxxas instead of Tamiya Tongue
Edited my previous post. Traxxas are GREAT connectors..

On the other hand, I have had 2 Tamiya connectors melt, while using LiPO Shocked
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« Reply #27 on: June 05, 2011, 09:34:27 PM »
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That was on your BX?Huh?
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« Reply #28 on: June 05, 2011, 09:53:10 PM »
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Yes. On the stock brushed system.
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« Reply #29 on: June 22, 2011, 10:35:27 AM »
rajathv8
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Did the motor problem get resolved? Curious to know what the problem was.
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« Reply #30 on: September 13, 2016, 12:59:59 PM »
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I think 3 cell lipo battery is very good for sparrowhawk. I have a Gens ace 1000mAh 11.1V 25C 3S1P Lipo Battery Pack for my sparrowhawk, it can works well, the old battery can't discharge is very normal,every battery has its life,you need replace a new one .
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