li-po in hard case

[captain harlock]

Check this out, it looks very tempting:

http://www.speedtechrc.com/store/ebp...id=133&id=5826

[Nick]

Whats the voltage?

[Batfish]

Peak and Orion both make these packs now. They are made to replace a 6-cell nimh pack. They are 7.4v and the dimensions are within 1mm of a normal 6-cell pack.

[captain harlock]

I'm only waiting for these things to be sold within the 70s range or so.
BYT Batfish, do you have any idea whether these packs are equipped with a balancer or not?!

[MetalMan]

They supposedly have a balancer built-in.

[Batfish]

Originally posted by captain harlock
I'm only waiting for these things to be sold within the 70s range or so.
BYT Batfish, do you have any idea whether these packs are equipped with a balancer or not?!

Orion's listing says there is a balancing port on the pack, but you can't see anything in the pic they've released. Peak's listing doesn't say if they do.
I think there are a couple of the Orion packs in stock at my local track. I'll be racing on-road tonight, so I'll see if I can get a good look at one of those packs. I hope they're not sealed in the package - I'm not ready to spend $165 (yes, that's the shop price) for one of these packs.

[captain harlock]

Probably they're expensive because of the hard case it has been covered with, but I'm not sure if its a hard case or not. The other lipos are covered with heat shrink tubes. As for the prices, speedtech rc is one of the most beloved rc shops for all the parts and touring cars being sold for a very challenging ( TC4, for example, is sold for 220 at towers, but 190 at speedtech) and reasonable prices. Lipos might be sold for even less prices in the future through them. Those who need after market parts for their cars can find many things at this place. Sounds like I'm making an advertisment for them...

Any way, Will the Scorpion charger be able to charge it?

[Batfish]

The Scorpion (and other) FMA/Kokam chargers are designed to charge their specific packs. Although I'm sure they could be used for others, I would not recommend it.
They have a proprietary charging jack.

[RC-Monster Mike]

The Orion/Peak batteries use Kokam cells. They have a balancing port on the bottom side, opposite the battery plug in side. They are 7.4 volt, 4800mah and about the same size as a 6 cell 3700 pack, but weigh abour 4.5 oz or so less. I just got a few in to test, actually. The battery connection actually plugs into the case using gold connectors, (the balancing port is similar), so you can easily attach your own connectors(and easily reverse voltage if you don't pay attention when you plug in the connector leads!).
They seem like a great product for off road use, as the plastic case should prtect the cells and eliminate most of the "concern" when using these in an e-maxx or electric Revo.

[captain harlock]

So they are good in comparison with other shrink tubed lipos.
Well, lets save some money after I get my sweet truck.;)
Hope you have given my list a peak. :)

[MetalMan]

Originally posted by RC-Monster Mike
They seem like a great product for off road use, as the plastic case should prtect the cells and eliminate most of the "concern" when using these in an e-maxx or electric Revo.

I disagree somewhat. Since these packs are in a hard case, you can't know anything about the physical state of them. For example, you would never know if they ballooned. Also, if they got too hot you would never know it.

[captain harlock]

What might cause the ballooning, Metal Man?

[MetalMan]

Originally posted by captain harlock
So they are good in comparison with other shrink tubed lipos.
Well, lets save some money after I get my sweet truck.;)
Hope you have given my list a peak. :)

Shrink tubed lipos? You mean shrink wrapped Lipos :L:. Not really, because a thin layer of plastic will transfer heat a lot better than thicker plastic (of a hard case). Just about the only good thing this case provides is firm protection for the cells if for some reason the pack were to be ejected from the vehicle. A standard Lipo pack that is firmly secured into a vehicle works just fine.

[MetalMan]

Originally posted by captain harlock
What might cause the ballooning, Metal Man?

Overdischarging, overcharging, overtemperature, imbalance.

[captain harlock]

More than anything, it will explode. I take it back, for now.