L.B.D
For those of you who have a collection of batteries and battery packs !
Testing battery packs has become a daily activity lately, and having some way to drain large AH ( Amp / Hour ) battery packs has become a need...
One option, strap a pack to a bike and go for a ride!
However, this is not always practicle or possible when troubleshooting battery " Pack " problems.
Home Depot :
3 x Double lightbulb ceiling fixtures = 2$ each x 3
Scrap piece of 2 x 4 = Free
200w, 120v G.E. Lightbulb = 2$ each x 6
Anderson Powerpoles = 1 $
Total : 19 $
For under 20 $ you have a device that wil drain a 72v battery pack at 600w . If you go online and search for various RC ( Remote Control ) battery testers, they cost from 10 to 600 $ with all kinds of fancy USB graph capabilities etc..
Those are great, but if you are on a budget and/or do not have a need for 100 % accurate performance data, this is the way to do it.
As shown above, I connected all positive(white) and all negative(black) leads together, soldered 2 leads and finished it off with Anderson PP's ( below )
Once you start to gather different battery packs and more charagers, having every connector the same makes life much easier. Some people prefer " Deans " connectors, but personally I prefer Andersons.
On The Left- 15/30 Amp ..... On The Right- 45 Amp
I have been using the cheap 10 $ vice type tool, but I plan to upgrade fairly soon to the right tool for the job:
