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  1. O

    How long should a new pack keep full voltage?

    I have a pack under 2 months old it has lost .6 of a volt. 14s4p under 20 charge cycles on it, once the charger shuts down the voltage drops to 58.2. If i leave the charger on overnight it drops even more, a 10 hour charge drops it to 57.8. I'm losing a full volt on a brand new pack. The...
  2. O

    4 dead cells. options? 18650

    10s4p samsung 26f bottle battery has 1 string of 4 dead cells. The bms was crushed in one corner and quit feeding that group of 4. I replaced the bms, it now charges the 4 cells up to .74v then cuts off when the remaining 36 cells hit 4.2. When the charger cuts out the 4 bad cells drop to 0...
  3. O

    48v grampa trike build

    Updated the title as the parts are in and it's moving forward. Will post the progress even though i'm probably the only one building a mobility trike for use around the yard... I'm looking to propel my adult trike around a 1/2 acre with a few short, steep grass hills. Looking for cheap...
  4. O

    NCA stability

    Battery University gave nca low marks for safety.. http://batteryuniversity.com/learn/article/types_of_lithium_ion That was written 4 years ago. Anybody know if the new 18650 nca cells are more stable? Or is 302°F unlikely on an ebike?
  5. O

    Bmsb bottle battery?

    I need a 48v ~12ah 18650 battery pack. Panasonic-09 for $400 shipped looks decent https://bmsbattery.com/ebike-battery/684-48v116ah-bottle-09-panasonic-battery-charger-battery.html Questions for anyone who's recently bought a bmsb-09... 1. What are the recent odds I will get this battery...
  6. O

    Gocarlite?

    also called ElectricBikeSolutions, anybody know of it? Not much online http://gocarlite.com/Electricbikekitproducts.php?view=productPage&product=20&category= Looks like $1130 shipped stateside w/battery, maybe the cheapest kit of its size. 12ah nmc, 22/40a controller Looks like he upgraded the...
  7. O

    24v to 36v??

    Looking for a little more grunt from a hilltopper lithium kit. Motor is 8fun SWXK. am looking at buying another li-ion battery pack from CR, cost is $149 for 6.6 ah which is the same pack i already have. Am thinking to cut the new pack open, soldering on 2 parallel leads so I have a 12v pack...
  8. O

    Charging with my Dinghy

  9. O

    F/S Build

    Looking for input converting a bike i picked up Bike Steel frame & swingarm 5" travel Plan Rear hub motor 48v, ~12t geared, Can build a wheel could piece together from different vendors. Battery 13-15ah, 3c+ no lipo Controller 20-25a Questions Am i underbuilding anything...
  10. O

    more torque?

    ]is this a shunt? Controller is 15a looks the same as the one in this thread http://endless-sphere.com/forums/viewtopic.php?f=2&t=40602&p=593265&hilit=+modify+shunt+more+torque+more+power#p593265
  11. O

    Hilltopper Cruiser

    Old bike, new kit
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