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Hobbykings new 5000mAh hardcase LiPos

Posted: Feb 01 2011 10:56am
by olaf-lampe
There must be a hook. The price is to good to be true:
http://www.hobbyking.com/hobbyking/stor ... duct=15521

-Olaf

Re: Hobbykings new 5000mAh hardcase LiPos

Posted: Feb 01 2011 11:55am
by chroot
Nice one, It's only have 4S cells and it would be nice to have 5s or 6s hardcase as protected as if drop or hit by any object without hurt LiPo cells. You could make a 8S pack if your charger support 8S balancer.

Re: Hobbykings new 5000mAh hardcase LiPos

Posted: Feb 01 2011 12:19pm
by itchynackers
Might be harder to observe a puffy cell, or do surgery.

Re: Hobbykings new 5000mAh hardcase LiPos

Posted: Feb 01 2011 12:20pm
by AmpEater
Awesome. Everyday I wish my lipo were hardcase.....but yeah 5s, 6s, 8s would be nice too.

Ps - the price gets lower, from $22.59 to $21.38 if you wait a few min

Re: Hobbykings new 5000mAh hardcase LiPos

Posted: Feb 01 2011 12:31pm
by liveforphysics
Wow that's freaking cheap!

I love hobbycity!

Re: Hobbykings new 5000mAh hardcase LiPos

Posted: Feb 01 2011 1:19pm
by grindz145
That is one of the harder problems to solve when mounting a ton of LiPo. They've solved the problem and practically not charged you for it... Awesome.


~30c/Wh ......wtf.....

Re: Hobbykings new 5000mAh hardcase LiPos

Posted: Feb 01 2011 1:45pm
by liveforphysics
It's cheaper than Thundersky. It's cheaper than Headways.

The future of EVs looks so bright, my smiley's gotta wear shades. 8)

Re: Hobbykings new 5000mAh hardcase LiPos

Posted: Feb 01 2011 2:06pm
by grindz145
and it can only go lower from here. :shock:

To put it in perspective, this is the same price I payed for used Konion cells in makita drill packs only a year ago...

Re: Hobbykings new 5000mAh hardcase LiPos

Posted: Feb 01 2011 2:24pm
by johnrobholmes
Yeah, really. Where is the hook!

ARrrg! I don't need more! Must resist... Must resist!!!!

Re: Hobbykings new 5000mAh hardcase LiPos

Posted: Feb 01 2011 2:52pm
by liveforphysics
Just as an FYI, I tried to buy in lots of 15, but it won't let you ship by air-parcel for LiPo amounts over 75Ah total, which means you're either limited to 3packs an order with air parcel shipping, or if you go EMS express (which costs about $10-20 more), you can ship up to 11packs at a time, but it leaves ~400grams of unused shipping weight, so going to 10packs at a time for 19grams unused shipping weight with EMS express works out to be the optimization for folks looking to buy a large amount of the packs.

This ends up just ducking $0.41/watt-hour shipped to your door.

This actually makes it cheaper than lead for usable watt-hours per dollar shipped to your door.

Lead = Dead. I piss on it's grave.



So, with this deal, every 10 packs you buy will be $303 shipped to your door, and will be 740watt-hours. So, for the competent DIY folks interested in a useful range Ebike, it's under $909usd to have 2.2kw-hr of batteries shipped to your door. If wisely use the remaining $81 on wire, shrink, connectors, JST plugs, etc, for $1,000usd and a day of assembling, you can have the 2.2kw-hr ebike pack of your dreams.

I'm going to buy a few dozen of these packs (because I know they will sell-out soon), I just hope they aren't cheap because they are from a shitty run of cells or something lame. I haven't bought a bad-cell yet from Hobbycity, and I think it's because I normally buy the premium stuff only, so I guess this will be a taste of what the non-premium cells are like.

Re: Hobbykings new 5000mAh hardcase LiPos

Posted: Feb 01 2011 3:13pm
by Ypedal
yeah.. i'm looking at having to perform surgery on 6 packs of the 16 packs i have.. ( 20C 6S packs ) .. grrrrr....

Re: Hobbykings new 5000mAh hardcase LiPos

Posted: Feb 01 2011 3:19pm
by liveforphysics
I have 60 of these packs coming, which isn't even 2 grand. :)

Combined with my current pack, if I can fit it all on the same bike, I will be rolling with 6.4kw-hrs. 8) 8) 8) 8) 8)

This will let me have 100mile range bicycle while riding at an aggressive 64watt-hours per mile.
That would be a pretty nice little commuter/touring bike.

I'm thinking something silent, relaxed, and reliable. Maybe a hard-tail bike modified to hold a mark-cycle hubmotor, a monster Kelly-controller, and pannier bags that stow all the LiPo, and an on-board charger setup that can toggle between 1200watt charging or 5,000watt charging depending if I can get 110vac or 220vac.

Keep in mind, that will NOT be a motorcycle. That is a bicycle. It will have pedals and look like a totally normal bicycle with pannier bags in the back. It will just have a little more peppy acceleration and stamina than some ebikes. ;)

Re: Hobbykings new 5000mAh hardcase LiPos

Posted: Feb 01 2011 3:26pm
by torker
As soon as my damn Paypal account confirms Arrggh! It's 15s baby. Put about 27 lbs. of lead where it belongs. Hooked to my solar panels :mrgreen: :mrgreen:

Re: Hobbykings new 5000mAh hardcase LiPos

Posted: Feb 01 2011 3:32pm
by grindz145
liveforphysics wrote:I have 60 of these packs coming, which isn't even 2 grand. :)

Combined with my current pack, if I can fit it all on the same bike, I will be rolling with 6.4kw-hrs. 8) 8) 8) 8) 8)

This will let me have 100mile range bicycle while riding at an aggressive 64watt-hours per mile.
That would be a pretty nice little commuter/touring bike.

I'm thinking something silent, relaxed, and reliable. Maybe a hard-tail bike modified to hold a mark-cycle hubmotor, a monster Kelly-controller, and pannier bags that stow all the LiPo, and an on-board charger setup that can toggle between 1200watt charging or 5,000watt charging depending if I can get 110vac or 220vac.

Keep in mind, that will NOT be a motorcycle. That is a bicycle. It will have pedals and look like a totally normal bicycle with pannier bags in the back. It will just have a little more peppy acceleration and stamina than some ebikes. ;)
I didn't think that my 4.7kW-h would get upstaged so soon :shock: :twisted: :twisted:

P.S. Frock motor? Really? Methods is a bad influence on you.... 8)

Re: Hobbykings new 5000mAh hardcase LiPos

Posted: Feb 01 2011 3:34pm
by grindz145
torker wrote:As soon as my damn Paypal account confirms Arrggh! It's 15s baby. Put about 27 lbs. of lead where it belongs. Hooked to my solar panels :mrgreen: :mrgreen:
you still can't quite beat the $0.09/Wh of lead, for stationary applications, not the mention the shelf life.

Re: Hobbykings new 5000mAh hardcase LiPos

Posted: Feb 01 2011 3:52pm
by Sacman
johnrobholmes wrote:Yeah, really. Where is the hook!
It could be that HobbyKing has found a way to finally sell all the packs that they have that perform up to spec electrically ... but just don't look good aesthetically (ie. slightly swollen, or blistered). What better way to get rid of them but to cover them up and market them in a "hardened case" so you can't really see the cells.

But on the other hand I just noticed looking at the specs that these packs can take a charge rate of up to 5C. This might be an indication that these packs might be made of better than the regular cells which only have a max charge rate of only 2C.

Re: Hobbykings new 5000mAh hardcase LiPos

Posted: Feb 01 2011 7:30pm
by texaspyro
liveforphysics wrote:I have 60 of these packs coming, which isn't even 2 grand. :)
How about a 6.4 kW LiPo short circuit/case piercing/overcharging test video? :twisted: Inquiring minds want to know...

Re: Hobbykings new 5000mAh hardcase LiPos

Posted: Feb 01 2011 7:33pm
by liveforphysics
texaspyro wrote:
liveforphysics wrote:I have 60 of these packs coming, which isn't even 2 grand. :)
How about a 6.4 kW LiPo short circuit/case piercing/overcharging test video? :twisted: Inquiring minds want to know...

Bro, you fund it, and I will make it happen with a smile from ear to ear. :)

Re: Hobbykings new 5000mAh hardcase LiPos

Posted: Feb 01 2011 7:37pm
by liveforphysics
BTW- Since you're a pyro, you saw my flamethrower I made with Methy last weekend right?

http://www.youtube.com/watch?v=fo1thw5z1mI

http://www.youtube.com/watch?v=-n0QVbKfbgc

Re: Hobbykings new 5000mAh hardcase LiPos

Posted: Feb 01 2011 8:21pm
by AussieJester
grindz145 wrote:
liveforphysics wrote:I have 60 of these packs coming, which isn't even 2 grand. :)

Combined with my current pack, if I can fit it all on the same bike, I will be rolling with 6.4kw-hrs. 8) 8) 8) 8) 8)

This will let me have 100mile range bicycle while riding at an aggressive 64watt-hours per mile.
That would be a pretty nice little commuter/touring bike.

I'm thinking something silent, relaxed, and reliable. Maybe a hard-tail bike modified to hold a mark-cycle hubmotor, a monster Kelly-controller, and pannier bags that stow all the LiPo, and an on-board charger setup that can toggle between 1200watt charging or 5,000watt charging depending if I can get 110vac or 220vac.

Keep in mind, that will NOT be a motorcycle. That is a bicycle. It will have pedals and look like a totally normal bicycle with pannier bags in the back. It will just have a little more peppy acceleration and stamina than some ebikes. ;)
I didn't think that my 4.7kW-h would get upstaged so soon :shock: :twisted: :twisted:

P.S. Frock motor? Really? Methods is a bad influence on you.... 8)
Definitely is, the upside though, Luke may finally get his first functioning e-bike....worse case scenario, a heap more lipos to blow up... :mrgreen:

KiM

Re: Hobbykings new 5000mAh hardcase LiPos

Posted: Feb 01 2011 8:34pm
by liveforphysics
AussieJester wrote: Definitely is, the upside though, Luke may finally get his first functioning e-bike....worse case scenario, a heap more lipos to blow up... :mrgreen:

KiM
You're jumping to conclusion. I will find a way to make it unreliable and uneconomical. I am a master of this.

Re: Hobbykings new 5000mAh hardcase LiPos

Posted: Feb 01 2011 9:09pm
by SamTexas
grindz145 wrote: you still can't quite beat the $0.09/Wh of lead, for stationary applications, not the mention the shelf life.
Huh? Where can you buy lead-acid at that price?

Re: Hobbykings new 5000mAh hardcase LiPos

Posted: Feb 01 2011 9:11pm
by torker
Keyword: Stationary :mrgreen: :mrgreen:

Re: Hobbykings new 5000mAh hardcase LiPos

Posted: Feb 01 2011 9:17pm
by SamTexas
torker wrote:Keyword: Stationary :mrgreen: :mrgreen:
Oh, ok. I don't think I want a stationary ebike :)

Anyway these 14.8V 5Ah hardcase packs sound reasonable. So a 44.4V 10Ah pack would cost $130. How much more do I need to buy a "fool proof - no worry" charger and BMS? I definitely have no desire in worrying about overcharging, balancing and LVC.

Re: Hobbykings new 5000mAh hardcase LiPos

Posted: Feb 01 2011 9:18pm
by spinningmagnets
Just for conversation, I believe these are the stock connectors, (if you don't already have a preference for a specific connector type) $3 for 10 pieces, 4mm pins/sockets with plastic polarised shells:

http://www.hobbyking.com/hobbyking/stor ... oduct=9283