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Old 10-05-2010, 01:56 PM   #1
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Hi all,

I've been out of the hobby for a while and I see a lot has changed! Anyway, my chassis is OK, I have a TC4 Factory but I'm still running a Tekin G10 ESC, 2000MaH packs with a 6 turn brushed motor.

I want to slowly upgrade this beast instead of all at once...I was planning on getting a brushless system like Novaks GTB, etc but I'm very confused when it comes to the batteries and charger. Which batteries are the best for performance which also last very long per run? First thing I want is a new charger and packs...if I get these, can I temporarily run them off the G10 ESC (deans connectors)?

Thanks
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Old 10-05-2010, 05:05 PM   #2
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You can get lipo batteries.However,you must also make sure that the charger can be use to charge the lipo pack.The lipo pack also need to use deans connector.
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Old 10-05-2010, 05:24 PM   #3
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You can get 4000mAh - 5600 mAh LiPo batteries, and spend anywhere from $25 for one of the Turnigy packs from hobbyking.com, up to $125 for ThunderPower. As stated above, you *MUST* charge them with a LiPo capable charger. You also cannot over-discharge them, or they will swell up, effectively ending their life. They are garbage after that (and are a risk of catching fire if you continue to use them). Some come with Deans connectors already installed, some use bulllet connectors, some you have to add your own.

You can get a decent LiPo charger for around $50.

The Tekin ESC will work fine, as will your current motor. Newer ESCs contain LiPo cutoff settings to prevent over-discharging.
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Old 10-05-2010, 05:25 PM   #4
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I was in the same state about a couple of months ago - dusted off the ol YR4-M and ran it. I quickly found that my older NiCd packs were now paper weights. I picked up a couple of 3300mah NiMh packs - my current charger could only support NiMh. The run times I got from the 3300 and my older Tekin ESC + 13 turn motor were better than my older NiCd packs.

Fast forward to present: Castle Creations SideWinder with a 5700KV motor and a 2S 30C LiPo pack. Literally - night and day difference. If you can swing the cost of a good LiPo capable charger, a decent hard case LiPo pack, and a LiPo charging sack : I would skip the NiMh route. I would also pick up a voltage cutoff module - to make sure you don't drain your pack(s). Some LiPo packs come with Deans ultra plugs standard.
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Old 10-06-2010, 07:17 AM   #5
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Thanks a lot for the response.

So for a 1/10 scale touring car, do I still need a 6cell lipo? I searched around, and I see a ton of 3-4 cell lipo packs but none in 6. Is 3-4 the norm, o they for smaller chassis? Also, do I have to check the charger to see if it support the number of cells and also capacity (up to 5600 mAh).
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Old 10-06-2010, 08:06 AM   #6
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Quote:
Originally Posted by ddzc View Post
Thanks a lot for the response.

So for a 1/10 scale touring car, do I still need a 6cell lipo? I searched around, and I see a ton of 3-4 cell lipo packs but none in 6. Is 3-4 the norm, o they for smaller chassis? Also, do I have to check the charger to see if it support the number of cells and also capacity (up to 5600 mAh).
No, you want a 2 cell LiPo. LiPo cells are 3.7v each (nominal voltage), so a 2s LiPo is 7.4 volts. 2s LiPo is the standard for touring car. Plenty of 2s LiPo packs are available in the 5000mAh range. Virtually all LiPo capable chargers will handle a 5000 mAh 2s LiPo.

A 6s LiPo is 22.2 volts. The ESC probably can't handle that voltage, as well as the rest of the electronics. It would be almost impossible to drive as well.
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Old 10-06-2010, 08:40 AM   #7
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Quote:
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Also, do I have to check the charger to see if it support the number of cells and also capacity (up to 5600 mAh).
The charge rate of the LiPo charger should be able to take care of the capacity of the pack - as CarbonJoe posted most chargers can handle 2S packs. I would recommend (while you're looking) to look for a charger that has a balancer.
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Old 10-06-2010, 09:57 AM   #8
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OK, great thanks a lot. So even if I upgrade all my electronics to brushless GTB, etc, I still wont require a 6 cell right? Just want to make sure this charger is good for a couple of years lol I see a lot with 4 cell max capability which is why I wanted to double check
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Old 10-06-2010, 10:29 AM   #9
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Quote:
Originally Posted by ddzc View Post
OK, great thanks a lot. So even if I upgrade all my electronics to brushless GTB, etc, I still wont require a 6 cell right? Just want to make sure this charger is good for a couple of years lol I see a lot with 4 cell max capability which is why I wanted to double check
No to the 6s LiPo. As I stated before, that's 22.2 volts! Your 6 cell NiMH pack is 7.2 volts. 4s LiPo is 14.8 volts, which is still too much for touring car.

2s LiPo is what you want, somewhere around 5000mAh.
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Old 10-06-2010, 12:41 PM   #10
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Perfect, time to go shopping, thanks
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Old 10-06-2010, 01:41 PM   #11
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ddzc - if you do get a 6S setup, and load it in your car; make sure you capture it on video and post it. I'd love to see it rip.
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Old 10-06-2010, 01:44 PM   #12
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rocket speed, we might see esc goes up in smoke and the motor as well.
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Old 10-07-2010, 07:28 AM   #13
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haha maybe I will before I upgrade my electronics LOL they're not worth much today anyway

One last question for you guys, I see a lot of 2 cell packs but they range (20c, 25c, 30c, 35c, 40c). What do these mean? higher the better?

Thanks
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Old 10-07-2010, 07:39 AM   #14
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Quote:
Originally Posted by ddzc View Post
haha maybe I will before I upgrade my electronics LOL they're not worth much today anyway

One last question for you guys, I see a lot of 2 cell packs but they range (20c, 25c, 30c, 35c, 40c). What do these mean? higher the better?

Thanks
Mostly marketing.... There aren't (to the best of my knowledge) any industry standard tests to verify the manufacturers' claims. Most wires and/or solder connections would melt at the discharge rates they are claiming, especially the burst current ratings, which are 2x the continuous C rating (the one on the sticker). For example, some of the packs claim 65C for a 5600 mAh battery, or 364 Amps under a continuous load, or 728 Amps for bursts up to 10 seconds. That will unsolder or melt the wires.

That said, most people claim that the higher C ratings are better for mod motors, and that the 40C and less packs are better for stock.
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