Battery 24V reliable

[guyazulay]

Hi
I own a folding bike
I'm with 24V batteries Ltium
24 amp hour capacity
I get 46 mph
Range of 26 km
Or
25 mph
38 km

  I have 1100 km on the bike total

I find a problem with the batteries lately
My driving range significantly decreased ..
I go 100 Mounts
I have a driving range 18 km
And entered into a loading capacity of 15 000 amp hour battery
Instead of 24 000!

Now questions

One. What batteries do you recommend to use the most reliable?
Many charge cycles
Good price
Thank you

 

[circuitsmith]

Looks like you are using Turnigy or Zippy lithium batteries.
How do you charge and balance them?
They can be reliable if properly taken care of.

 

[guyazulay]

I connect each individual battery charger that:
http://www.hobbyking.com/hobbyking/store/__18812__Turnigy_4x6S_400W_Lithium_Polymer_Battery_Charger.html

4A charge rate!

Recently I build a nice enclosure for batteries
All batteries are connected together
All balance connected together
And all cargo with exit 400W
I think that's enough saves on battery
Bicycle consume 40A is not loading the batteries
Batteries Ltium just not much life
These batteries on a plane we fly once a week and it is not noticeable
But I do two loads a day
And travels 25 km on average per day!

Anyone else can help?
Recommendation batteries?

 

[dogman dan]

40 amps can load em up enough to ruin em, if you are running a small capacity pack. But it sure looks like you have 15 ah there, so that should be discharging around 3c.

What size packs are those? are they larger than the typical 5 ah?

That leaves overdischarging them as the possible culprit, or just a random bad pack from HK has cut your capacity. One bad cell would do the trick.

 

[guyazulay]

I have a 24A capacity!
All Battery 30C!
What are you talking about? I do not mind not battery
It just did not hold much battery time ..
I ask Is Life Batteries will keep longer? More charges?
Like these .. (What do you think?)



http://www.ebay.com/itm/24V-20AH-LiFePo4-Electric-Bicycle-Battery-Scooter-EBike-Rechargeable-3-2V-18650-/261124422890?pt=LH_DefaultDomain_0&hash=item3ccc3a7cea

 

[dnmun]

no, do not buy a Vpower pack.

how do you know you have dropped to 15Ah? do you have a BMS on the battery that shuts it off at LVC? which of the cells is low?

 

[guyazulay]

Because
New batteries I to travel 25 km
Today I travel 15 km I ran out of battery
I plug in the charger I see into only 15 amps

 

[dnmun]

so you have no amp meter or wattmeter to monitor the discharge and you have no cell level voltage measurements?

what kind of charger do you use and does it give you a voltage reading of each cell when it is charging?

 

[guyazulay]

Look up messages with Kishon wrote reload all data
What charge cycles Ltium should possess??

 

[dnmun]

so you don't know anything about the state of charge of the cells in the battery?

 

[guyazulay]

I load cells are balanced with balancing Connector

 

[dnmun]

first thing, you need to buy a voltmeter. then measure the voltage of the cells in the battery.

 

[guyazulay]

What do you recommend?
What type of battery is better
Lithium
Or
Life?
What's more terrifying charge cycles?

 

[agniusm]

Lithium is component in batteries, what you are looking for is chemistry used in these batteries.
You can check basics here: http://endless-sphere.com/forums/viewtopic.php?f=14&t=26621
and here: http://en.wikipedia.org/wiki/Lithium_battery
LiFePO4 chemistry is most robust regarding safety but at a cost of weight. It also offers 2000 cycles and 80% capacity after, some goes up to 3000 cycles if you use them as per recommendation.
Those HK packs i know little about, but most will have lifespan of 800 cycles, are more dangerous if not maintained and have better power density. At the moment i always choose lifepo4, this is my preference of chemistry.

 

[guyazulay]

Thank you!

Do you have a link to a good deal
24V Battery Life
20Amh
Or
25amh
Or
30amh

 

[guyazulay]

Thank you!
Can you give me a link to a good deal of Battery Life
24V data
20amh
Or
25amh
Or
30amh

 

[dogman dan]

I'm sorry if I'm communicating poorly.

You could just be having a random bad cell in the pack. One bad cell, and the whole pack will have less capacity. We all have come to expect about 10% of hobby king packs to fail early. I think you just got unlucky, and have one in four gone bad.

Figure out which pack has a bad cell, and replace the pack. A wattmeter on the bike really helps with managing RC lipo.

 

[guyazulay]

http://www.ebay.com/itm/24V-20AH-LiFePo4-Electric-Bicycle-Battery-Scooter-EBike-Rechargeable-3-2V-18650-/150829668495?pt=US_Rechargeable_Batteries&hash=item231e26188f


How about this deal?