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  1. Batteries and Charging
    Hey guys, we are looking for some terminal post covers for our Thundersky lithium batteries. Any suggestions or recommendations? Thanks
  2. Batteries and Charging
    Our 48 Thundersky LiFePO4 100Ah batteries have a top charge of 162 but sag while conservatively driving to around 124 or so. Is this acceptable, or harmful to the pack?
  3. All EV Conversions and Builds
    Hello all, first post and relatively naive so be gentle ;) I have a very ambitious conversion planned and I would like to have your feedback/expertise. The plan is to use a honda crx hf and create a long range cruiser that can go farther than 200 miles (goal is 300) on a charge at 65 mph. This...
  4. Batteries and Charging
    Just installed lithiums! Went 65 miles on first trip before the Mini BMS beeped at me, then it let me go another 5 miles without beeping. Charged the pack, but I have one battery I bought off of E-bay that shows fully charged before the other batteries I bought from ElitePowerSolutions.com. So...
  5. Batteries and Charging
    Hello All I need some expert help, I have been doing some calculating and want to see if my numbers are accurate, I used the methods out lined in "Sizing Your Battery Pack" http://www.diyelectriccar.com/forums/showthread.php?t=11709 . I would like to have a pack that can handle my 70 KM trip to...
  6. Batteries and Charging
    we have newest models : 38140S and 40160S(3.2V16Ah) cylindrical cells. compare with 38120,higher capacity! 38140S Nominal Capacity: 12AH Nominal Voltagge: 3.2V Charging Voltage:3.65V Cut off Discharge Voltage:2.0V Charging Method:CC/CV Max Charg Current(continuous):60A Max...
  7. Batteries and Charging
    I understand that 6 volt batteries have a greater energy density than 12 volt batteries, though I'm not sure what that means to me as a hopeful EV builder/driver. The question is, does it make any difference for a 120VDC system if I use 10 each 12 volt batteries, or 20 each 6 volt batteries...
  8. Blog
    For lithium this is not a know thing. For lead it's pretty much a given but it still depends upon how well you care for your batteries and how deep you discharge them. I know that for me even changing out lead every 4 years would be far cheaper than lets say one pack of lithium for 10 years. My...
  9. New Member Introductions
    Hi all, I was chasing some internet links around the other day and stumbled upon A123's Developer Kit: http://www.buya123systems.com/prdeki.html If I am reading this correctly you get 6 battery cells, each at 3.3v (for a total of 19.8v) for $129. For $220 you can double that to 12 cells to get...
  10. All EV Conversions and Builds
    Greetings All I found this website as another US based supplier of LiFePO4 batteries. www.lifebatt.com From the specs on their site, the cells will do 12C continuous discharge with 18C pulse (10 seconds). That is better than the A123 cells. Now here is the interesting part from their FAQ...
  11. Batteries and Charging
    I've heard that NiMH batteries are the best to use but that they aren't commercially availible (only the big car companies can get them). What about using these; http://www.megabatteries.com/items.asp?cat_id=75 I'm not exactly sure what an "F-Cell" is but they are 12 volts, couldn't you just...
  12. New Member Introductions
    Just watched "Who killed the electric car?" and then youtubed EVs. Finished watching Gav's EV conversion and am now thoroughly obsessed with EVs!! I'm driving my girlfriend nuts with my obsession so I've decided to come here. I'm wondering how feasible it would be to build an EV (converting a...
  13. Batteries and Charging
    I have a noob question about batteries! I have no idea what the difference is between a standard car battery and lion batteries I know they are more powerful and last longer. In particular the http://www.lionev.com/Battery_module_pricing.html battery. how do those compare to other batteries as...
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