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Old 12-28-2010, 10:05 PM   #1
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Default Lipo's?

Hi guys, a bit of advise please. Other than the obvious advantages such as lighter, runs longer etc. What are the other reasons for running a Lipo in my buggy and truggy receiver? I currently run a NiMH hump pack but thinking of going Lipo.

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Old 12-28-2010, 10:20 PM   #2
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If your reciever and servo's can handle the extra voltage without a regulator they will have way more speed and torque, if you have to run a regulator the only advantage is the weight and run time. If you have to run a regulator LiFe may be a better option to consider as you will get the runtime with no regulator. Just another option to consider.
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Old 12-28-2010, 10:26 PM   #3
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Lipos are pretty cheap nowadays.

More Power. (Isn't that what everyone dreams of?)
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Old 12-29-2010, 05:48 AM   #4
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I run NiMh for my receiver packs but this year I'll go with LiFe because they don't need regulator to work with my servos. AE has new LiFe pack and I've ordered four of them.
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Old 12-29-2010, 07:30 AM   #5
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Are you guys balance charging these packs everytime? I like my Nimhs because I can run a lead outside my receiver box and connect to the charger without having to remove the battery.
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Old 12-29-2010, 08:01 AM   #6
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Originally Posted by hookem34 View Post
Are you guys balance charging these packs everytime? I like my Nimhs because I can run a lead outside my receiver box and connect to the charger without having to remove the battery.
Yes, I balance charge every time with the battery in the vehicle (although I leave my connection in the battery box, requiring that I remove the lid to charge). This is made easier by relocating the balance connector OFF of the battery and on to the charger cable. This requires changing the batteries power cable to include the third connection that the balance connector provides (the white wire in the photos of the batteries' power cables and on the custom charging cable).



Charger cable below connects white wire back to center tap of balance connector. The other 2 leads of a 2S LiPo balance connector are the positive and negative leads of the power cable. The 2S LiPo is unique in it's wiring configuration to be able to do this (just as you do not need a balance connector for 1S LiPo batteries).



This setup removes some clutter from the battery box and allows a single connection to connect to the charger like the NiMh setup.

This has worked well for 2+ gallons. Battery in this photo is a Common Sense 1700mAh. I have also modified the Robotronic 1500 mAh battery (a slightly smaller and lighter battery).

Below are the 2 LiPo batteries referenced above (Common Sense on top):

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Old 12-29-2010, 08:13 AM   #7
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I pay 5$ a pop for my Rx batteries.....I dont think it gets any cheaper then that.
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Old 12-29-2010, 09:04 AM   #8
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I pay 5$ a pop for my Rx batteries.....I dont think it gets any cheaper then that.
What brand? NiMh? LiPo?
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Old 12-29-2010, 11:02 AM   #9
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I run the the Losi Lipo RX ----- I run this for one reason..... It last way longer than other batteries
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Old 12-29-2010, 02:19 PM   #10
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Quote:
Originally Posted by vwduud View Post
What brand? NiMh? LiPo?


here's the best deal i could find on 4 & 3 .....remember you Want the FREE shipping.

4X- http://cgi.ebay.com/4x-7-4V-900mAh-L...item415442131e

3X- http://cgi.ebay.com/3x-7-4V-900mAh-L...item439daa43c3

Ive ran these packs for the last 2+ year's and wont run any Big 2000mah+ packs anymore, I just dont see the need for it.
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Old 12-29-2010, 02:34 PM   #11
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Originally Posted by Integra View Post
here's the best deal i could find on 4 & 3 .....remember you Want the FREE shipping.

4X- http://cgi.ebay.com/4x-7-4V-900mAh-L...item415442131e

3X- http://cgi.ebay.com/3x-7-4V-900mAh-L...item439daa43c3

Ive ran these packs for the last 2+ year's and wont run any Big 2000mah+ packs anymore, I just dont see the need for it.
The links show the items not available on eBay anymore, but I think I've seen these on eBay before. From Hong Kong right?

And I hear ya. Of my 2 LiPo's, I use a fraction of the capacity even with 30 minute main events. Thought about getting some of the 900mAh packs because of the size restraints of the D8 battery box. Had the 2 packs I ended up using not been available, I would have tried a 900mAh pack.

Doubtful I'll ever run in a main event for more than 30 minutes, but went with the "just in case" factor with pursuing the higher capacity LiPo's. In hind sight, the Robotronic is the best bang for the buck in terms of size and capacity. They're just not always easily available.
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Old 12-29-2010, 04:51 PM   #12
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Quote:
Originally Posted by hookem34 View Post
Are you guys balance charging these packs everytime? I like my Nimhs because I can run a lead outside my receiver box and connect to the charger without having to remove the battery.
\
I use a 2000 MAH Lipo from Yeah racing and there is no need to ever charge it at a track. I can race for almost 3 hours straight without worrying about charge or balance, so dont sweat the charge lead sticking out of your box
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Old 12-29-2010, 08:31 PM   #13
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Quote:
Originally Posted by vwduud View Post
The links show the items not available on eBay anymore, but I think I've seen these on eBay before. From Hong Kong right?

And I hear ya. Of my 2 LiPo's, I use a fraction of the capacity even with 30 minute main events. Thought about getting some of the 900mAh packs because of the size restraints of the D8 battery box. Had the 2 packs I ended up using not been available, I would have tried a 900mAh pack.

Doubtful I'll ever run in a main event for more than 30 minutes, but went with the "just in case" factor with pursuing the higher capacity LiPo's. In hind sight, the Robotronic is the best bang for the buck in terms of size and capacity. They're just not always easily available.

Strange, they were live this afternoon when i posted them, Ill see if i can find any more of if they were relisted for some reason.

Found the X4

http://cgi.ebay.com/4x-7-4V-900mAh-L...item415442131e

and here's the X3....Strange they come up unlisted like that, I cant say I have ever seen that.

http://cgi.ebay.com/3x-7-4V-900mAh-L...item439daa43c3
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Old 12-29-2010, 09:17 PM   #14
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anyone have any good recommendations on life batteries and chargers I know very little about them.
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Old 12-29-2010, 09:33 PM   #15
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I'm curious about something.

I seem to recall reading somewhere that while certain servos are designed to handle the high voltage of the lipos, that the higher voltage does take its toll over time in the form of shorter servo life expectancy. Can anyone confirm or deny this?
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