72 volt battery

What's your budget ? Calibattery 72v10ah for use with 18-20 amp. Controller. 700.00Usd. I havn't bought one yet, but looks like a good cheap one. ?
So what'your budget ?
 
AH and max amp draw?
 
Cheapest way to go is lead acids, but they are a lousy way to go because they weigh so much, 2nd cheapest is hobbyking lipos which are the lightest and arguably the best bang for the buck, but you have to know what you are doing and they can burst into flames, then there’s the commercial stuff, you pay out the wazoo for this crap, it’s pretty wimpy in the cold, saggy, heavy, and hey did I mention expensive; it seems like I didn't mention expensive enough, but its not as heavy as lead, its relatively safe and seems to last forever and not go bad.

My recommendation is to put lithium polymer batteries like you see in RC cars on your bicycle; you will need to learn how to properly use the stuff, but even if you ride the heck out of your bike you will get many years of use out of it.
 
Get 5 packs of nissan leaf battery and convert them to 4s1p. Then put them in series for 72V25Ah battery for around $600. But you do need to do some work and the pack will be technically a used pack because they are made of used nissan leaf batteries.

Also note the size because they are not easy to mount.

Finally figure out a way to charge them. I recommend lipo charger and charging as 10s2p.

If you have no clue what I have just said, stick with 48V battery packs and buy it complete, I.e. with charger and bms and such. As of now it is pretty tough to get 72V in a decent capacity to make it much use for less than $600 with all the charging setup for your.
 
I have been using something similar to these. A little bit of mucking around, but if you respect the Lipo, you will love it.

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=17914

Charge as 10s, 36 volt (2 sets of 5s balance leads).
Run 2 in series.
Some 72 volt controllers already have the appropriate LVC (otherwise you have to monitor)
 
Man, the ev bug bit you bad. Many of us have been through it. I couldn't stop till I'd raced at close to 50 mph.

Hobby king. you need 8 of the 5s 5000mha packs. or 10 of the 4s, but for 72v the 5s packs divide in half better. The cheapest are the 20 c type, but they will sag with a 40 amps controller. 30c or more packs will be worth it if you want less sag under load.

Read a lot, on how to handle these without burning your house or garage down. You are very green, so normally we'd never suggest hobby battery lico.
 
It would be a good idea to get a controller that has a plug for a C.A. to monitor the battery and controll a 40 amp. Controller.
C.A. is 130.00.
Some battery packs come with chargers.
If lipo power and power supply 150.00 for a decent setup to start. You don't want a 50watt charger
 
So just for you I decided to make a guide on how to make a 66volt 10ah battery pack without having to cut/solder anything:
buy 6 of these (or similar):
6s 5ah 20c Turnigy
http://www.hobbyking.com/hobbyking/stor ... _Pack.html
Image

buy 3 of these:
JST-XH Parallel Balance Lead 6S
http://www.hobbyking.com/hobbyking/stor ... T_XH_.html
Image

buy 3 of these:
HXT 4MM Bullet Parallel Adapter
http://www.ebay.com
Image

And you will need someone to make something like this except you want three in series instead of two like in the picture:
HXT 4MM Bullet Series Adapter
ebay.com
Image
Now set aside the "series adapter" we will worry about that later, and connect the batteries together with the parallel adapters and do the same thing with the parallel balance cables.

Your pack should now look kinda like this:
Image

Last step is to connect the series adapter to the ends of the parallel adapters. Now your battery pack should kick out 66volts (or 75 volts on a full charge).
 
I want to thank everyone on this forum for the suggestions.

I am quite the newbie still that is always looking for the speed.

The 48v Cali Battery is great but I want to get the Crystalite 7240 controller for my ebike.

Will the battery listed above be ok for the bike and speed that i want
 
You might want to look at this. :)
http://endless-sphere.com/forums/viewtopic.php?f=14&t=39666
 
And this too, if you haven't already. http://endless-sphere.com/forums/viewtopic.php?f=14&t=26621

Good source for accurate info about handling hobby lico packs safely.
 
You pmd me on how to series/parrallel.. here ya go

https://www.google.ca/search?site=&source=hp&ei=nI7yU8T0NM2ZyASLyYKwCw&q=series+parallel+battery+wiring&oq=series%2Fparrallel+batt&gs_l=mobile-gws-hp.1.0.0i13i30l5.2042.13594.0.14304.24.24.1.4.5.0.449.6939.1j3j7j11j2.24.0....0...1c.1.51.mobile-gws-hp..1.23.5250.3.ur4-VqIyN8g
 
Quick question on this battery

I purchased six of these batteries

http://hobbyking.com/hobbyking/store/__11937__Turnigy_nano_tech_5000mah_6S_25_50C_Lipo_Pack.html?strSearch=5000.6s

I have two batteries in a pack in which makes three packs.

I am using two packs together now to make 44.4 volts (I am assuming)

How many ah will the packs have and when i install the third pack howmany ah will it be total?
 
Please don't play with lipo if you don't know what you are doing.

I highly recommend you read up on battery series and parallel before going any further.
 
tazzman600 said:
Quick question on this battery

I purchased six of these batteries

http://hobbyking.com/hobbyking/store/__11937__Turnigy_nano_tech_5000mah_6S_25_50C_Lipo_Pack.html?strSearch=5000.6s

I have two batteries in a pack in which makes three packs.

I am using two packs together now to make 44.4 volts (I am assuming)

How many ah will the packs have and when i install the third pack howmany ah will it be total?
Click to expand...

Makes no sense to me. Words like "together" mean nothing unless you describe either "series" or "parallel" connections.

I look at total cells in series 44V nominal (50V hot off charger) = 12S. Then add up the parallel (P) total for your 12S series connection. Using these terms, 12S2P provides 10Ah label capacity. 12S3P = 15Ah, etc....

2qty 6S HK bricks (pack confuses things) connected in series creates 12S.
 
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