Battery ratings seem to vary a lot depending on manufacturer. Perhaps the worst offenders are some of the NiMH AA cells. I don't really know what is normal for the larger cells, but it's good to know I can pull 15.5Ah out of these cells and still only be at 80% DOD.D-Man wrote:Thats pretty good. Maybe the packs and others are under-rated for a reason.
So how many battery packs to you have on that bike now? Are they all the same or is it mixed?
Like I said, the CBA II will only sink 100W. Low C discharge ratings are standard in the industry... show me a manufacturer who advertises their cell capacity at 15A discharge. They might include it in the spec sheet, but the cell will be named at a more favorable C rate. A GP330SCH has a capacity of 3300mAh "when discharged at 660mA to 1.0V at 20 deg C". This cell will go 5 hours at 0.2C and 29 minutes at 2C.Matt Gruber wrote:Nice try, but i use cruising amps (15a) for reaL world tests.
they always read higher at low drain
Just the facts. The test was run at 0.2C and about 20 celcius which I understand is an IEC standard. In no way did I attempt to misrepresent the product, and the test speaks volumes for the quality control Justin does on each pack before it goes out the door. As one member recently discovered with a lithium pack, some companies will ship you packs that have never been analyzed.Reid Welch wrote:
Score one for Lowell!
I like Matt's reality checks too.
What do you use for an Ahr meter and low voltage cut off? I used to connect halogen bulbs to RC lipo packs but I always worried about overdischarging them, and watching batteries discharge isn't that exciting.Matt Gruber wrote:dont get upset, get some halogen bulbs 10 for $3.50 cat #LP-65 also get some 5/$1 switches ISW-4 better hurry, only 41,000 left! allelectronics.com
agreed, they are fine matched cells