where can I get a 48v 15ah lithium battery????? not LiFPo4

[Paul T]

I dont want a LiFePo4 as they are so big and heavy, and they're are supposed to be the newer technology?? Just a Lithium 48v 15ah with a good C rating. I have 36v 20ah on my 500w bike now and its probably a third of the weight and size of the equivelent LifePo4. I need it shipped to Brisbane Australia as my next bike will be 1500w so I need the 48volts I'll pay a billion dollars for it if they are that rare.

 

[wesnewell]

http://www.extremetech.com/computing/105343-graphene-improves-lithium-ion-battery-capacity-and-recharge-rate-by-10x

If you find any, let me know.

 

[neptronix]

Does it have to be safe? :lol:

 

[Hugues]

the last 2 on thgis page are not lifepo

i bought mine from there, i'm satisfied, one turned out with a weak cell, but finally i managed to bring it up in sync with the rest of the pack

http://www.hi-powercycles.com/category.sc;jsessionid=05E9DD0FEA357C98B1316607222240C9.qscstrfrnt04?categoryId=5

 

[neptronix]

$900 for 14S 10AH lipo with only slightly better cycle life than hobbyking lipo?

About $220 shipped for the equivalent amount of hobbyking lipo ( 14S/10AH ), lol
As a bonus, they will lie about the range.. 27 miles on 10AH on a BMC motor? Maybe if you are doing about 15mph constant.

I don't know who is worse, Chinese battery scammers or companies like this.

 

[Paul T]

14S 10ah?? whats the S? do hobby king do 48v batteries? I thought they only did milliamp batteries for RC etc. When they say 500 discharge cycles that means if you used your bike eveyday as I do in less than 18 months the battery has had it? I thought lipos were pretty much the same as LiFePo4 in regards to charge cycles and a led acid was like only a few hundered charge cycles. Then I wouldnt want to spend a grand on a battery thats only going to last 18 months.

Are batteries made anywhere else other than China? I know Samsung do lipo batteries they're Korean arent they?
So the 48v15ah Lipo is a rare item indeed..... :?

 

[neptronix]

You've got some reading to do if you want to use RC lipo. I was just giving a cost comparison. $900 for that amount of battery is kinda criminal, especially compared to something high end like the Dow Kokams!!

lifepo4 usually provides thousands of cycles. RC Lipo will do about 300, up to 500-600 with very careful management.

What people here on the forums do is take those, and hook them up in series and parallel, to get whatever voltage and amp hour figure you desire. But they are the most dangerous battery you can buy. If mistreated, the failure mode is a pyrotechnics / smoke show worthy of only the finest death metal bands.

There are certainly other options out there to consider first

Better get readin!

 

[amberwolf]

Take a look over in the Dow Kokam Group Buy thread. At the moment, that is probably the best non-LiFePO4 you can actually buy, with their NMC stuff. It's not a battery, though, just bare cells, so you would need to build your battery pack out of that, and come up with a charger and monitoring solution (the stuff from Methods in the Complete LiPo Solution thread in Items For Sale New will work for the latter).

 

[wesnewell]

14S means 14 cells in series. 51.8V nominal. Basically the same as what they sell as a 52V battery pack.

 

[Jason27]

Check eBay. There are some good deals there. You can get the same type battery I have which is lithium manganese. Wayy lighter than bulky lifepo4.

 

[neptronix]

Check eBay. There are some good deals there. You can get the same type battery I have which is lithium manganese. Wayy lighter than bulky lifepo4.

Please provide a link to something like you're talking about, as most of the eBay stuff is crap

 

[rojitor]

Beware ebay and beware customs too, you might get a surprise.

 

[Joseph C.]

I dont want a LiFePo4 as they are so big and heavy, and they're are supposed to be the newer technology?? Just a Lithium 48v 15ah with a good C rating. I have 36v 20ah on my 500w bike now and its probably a third of the weight and size of the equivelent LifePo4. I need it shipped to Brisbane Australia as my next bike will be 1500w so I need the 48volts I'll pay a billion dollars for it if they are that rare.

If you're interested in complete Lithium NMC batteries. They are lighter than Lithium Cobalt Oxide but don't have the high C-rating of LiPo or A123 LiFePO4.

You can get a 26 amp-hour battery that weighs less than seven-and-a-half kilograms or a massive 52 amp-hour battery that weighs under 15 kilogrammes.

http://www.chicagoelectricbicycles.com/Batteries.html

 

[Joseph C.]

Beware ebay and beware customs too, you might get a surprise.

Yep the EU are clamping down, big-time.

 

[neptronix]

Allcell battery is 2C maximum.. more like 1C for best use.. the OP wants a high C rate battery, so i doubt this fits the description.

The prices for allcell are more in line with reality than most, and are the lightest thing you can buy on the open market right now. I think they did drop in price recently.

 

[Paul T]

Thanks guys definately a learning curve

 

[Hugues]

$900 for 14S 10AH lipo with only slightly better cycle life than hobbyking lipo?

About $220 shipped for the equivalent amount of hobbyking lipo ( 14S/10AH ), lol
As a bonus, they will lie about the range.. 27 miles on 10AH on a BMC motor? Maybe if you are doing about 15mph constant.

I don't know who is worse, Chinese battery scammers or companies like this.

please give me the link to this pack at Hobby King, last time i checked i could not find a pack with the same energy that could fit in my frame bag.

Just to be sure we are comparing apples with apples, the ones i linked (and use) have an integrated BMS so i can bulk charge every day and maybe once a month i balance if needed, and that's important for me, but i understand it might not be for every one.

As for the range you say is a lie, 27 miles does not seem far from what i do with my pack.

 

[dogman dan]

Not lies, just failure to include data for speed and how much pedaling. Lot's of downhill wind at back range data too.

Many of us that need a lot of amps in a small package are packing hobby king lipo nowdays. The cheaper HK stuff is still more expensive than lifepo4 per mile. Best lifepo4 might be 20 ah packs from cellman, but 48v 20 ah is bulky, even in the pouch cells. But at least you get the good c rate, if lipo is scary to you.

 

[DAND214]

Paul T writes

I dont want a LiFePo4 as they are so big and heavy, and they're are supposed to be the newer technology?? Just a Lithium 48v 15ah with a good C rating. I have 36v 20ah on my 500w bike now and its probably a third of the weight and size of the equivelent LifePo4. I need it shipped to Brisbane Australia as my next bike will be 1500w so I need the 48volts I'll pay a billion dollars for it if they are that rare.

I think you should find the vendor of that 36v pack so WE can get the lightest most powerful pack available too

If that pack you have is so great, find the vendor, no need to look further.

If you think LiFoPo4 is heavy try some lead.

Dan

 

[richirich1113]

I also have the same type batteries as Hugues, They are from HPC. I have not ever ran my batts tottaly down to check the full milage. My farthest ride is 12 miles and the batts start at 58.5v hot ,at the end of 12mi riding -no pedaling and speeds averaging 30+ mph on a 18FET set to 45a-110 phase amp setting ang a HS3540, they rest at 52-53v.The batts have a 42v cuttoff. It only takes 1hr15min to 1hr-35min to charge them back up with a 4 amp charger.
Here is a link to a place that sells them with more specs on the battery. The only problem is they will only sell them in large quantities. I had found another place that were selling them for $499 but same thing- only large quantities.

http://www.all-battery.com/25.9V10000mAhHeavyDutyLiPolyBatteryPackwithPCB.aspx

 

[wesnewell]

I know what P.T. Barnum would say about you guys paying $500 or more for a 10ah 14s battery pack. I think I'll stick with my 15ah 12s pack that cost under $200 and will deliver over 100A continuous easily.

 

[Hugues]

I know what P.T. Barnum would say about you guys paying $500 or more for a 10ah 14s battery pack. I think I'll stick with my 15ah 12s pack that cost under $200 and will deliver over 100A continuous easily.

and you bought that from ?

 

[el_walto]

Paul T,

If you want something to use daily and is plug and play you will likely want a battery with BMS. This will add to the cost of your battery. Most LiFePo4 batteries already have a BMS included, and sometimes a charger also. You likely will get enough cycles out of LiFePo4 for 3 years of daily use.

 

[Hugues]

$900 for 14S 10AH lipo with only slightly better cycle life than hobbyking lipo?

About $220 shipped for the equivalent amount of hobbyking lipo ( 14S/10AH ), lol
As a bonus, they will lie about the range.. 27 miles on 10AH on a BMC motor? Maybe if you are doing about 15mph constant.

I don't know who is worse, Chinese battery scammers or companies like this.

please give me the link to this pack at Hobby King, last time i checked i could not find a pack with the same energy that could fit in my frame bag.

Just to be sure we are comparing apples with apples, the ones i linked (and use) have an integrated BMS so i can bulk charge every day and maybe once a month i balance if needed, and that's important for me, but i understand it might not be for every one.

As for the range you say is a lie, 27 miles does not seem far from what i do with my pack.

while we're waiting for Neptronix to come back to us...

i found that 7S pack at Hobbyking, 5 aH, so i need 2 to be able to compare to my pack i bought from HPC:
dimension of 1 pack at Hobby king = 155 x 49 x 64 mm, and does not seem to have an internal BMS, so i need 2 of these
my pack is : 180 x 70 x60, so slightly bigger than one pack of Hobby King.

I simply don't have enough space for 6 packs like this of Hobby King. Period. Maybe too expensive, but that seem to be the only solution for me.
http://www.hobbyking.com/hobbyking/store/%5F%5F19157%5F%5FTurnigy%5Fnano%5Ftech%5F5000mah%5F7S%5F65%5F130C%5FLipo%5FPack.html

 

[richirich1113]

I have researched the batteries from HPC. Only one place had a price of $499 listed but you had to buy a large quantity of them. So for HPC to sell them for $450 they would have to be buying them in very large numbers.
I was thinking about the HK lipos but the amount of them to equal plus the larger size difference ,then having to get BMS's , chargers , power supplys , battery medics, Balancing harnesses. Then hoping all six packs after the long wait from HK were going to show up and not have dead cells. The constant monitoring. For me also is just not worth it.
This is just my opinion.