I don't have the parts list in front of me, but a few weeks ago I was flying my Magnum Plus when at about the vertical eight part of the pattern, the motor started to slow down. Each lap it went a tad slower, etc. I finally let it land under power as it just could not stay in the air. Had to pull the plug to stop it. Any one have this happen?  At least this time it didn't catch fire...

I had a bad battery that would do this if I overtaxed it.  Flying faster than usual or in high density air (cool, low altitude), or in calm would cause it to wimp out. 

Drop the lipo battery in a bucket of salt water for about 24 hours(away from flammables)for about 24 hours, it will bubble like mad. You can now safely dispose of it in the trash can.

How or were does someone dispose of bad battery?   

Hi Larry, I'm in the process of moving house (bad idea!) and I had a few older lipos that needed to be chucked out. I did not want to throw them with any sort of charge into the bucket of salt water, so I looked around for a load to get rid of the charge. I could not find any load resistors that could do the job in my junk box and then a figured that I have a  number of foam cutters, and I just used one of them. My biggest battery was 4-cell so I just stuck a Deans plug on my longest foam cutters and it worked great. I left the setup somewhere where it could not cause any fires that would hurt anything and just left it. Once they were really flat I still left them the salt water for a few days, and then it's o.k. to chuck these dead lipos in the trash. There are no serious toxic metals in them.

I must say that I was amazed at how much power these batteries of ours have. Even after flattening, some of the cells would recover if the short was taken off, and bubbled for quite a while when put into the salt water.

Keith R

You're kidding me ...
No one is going to suggest putting it in the street, starting a video camera, and whacking it with a long stick with a nail in the end?

take care, All
  Dean P. (with tongue firmly in cheek)

all you need to do to discharge a battery is hook it up to a motor with and esc and turn it on. No special equipmet needed.

bob branch

I don't have the parts list in front of me, but a few weeks ago I was flying my Magnum Plus when at about the vertical eight part of the pattern, the motor started to slow down. Each lap it went a tad slower, etc. I finally let it land under power as it just could not stay in the air. Had to pull the plug to stop it. Any one have this happen?  At least this time it didn't catch fire...

When that happened to me, I found out that I had fried the motor and the Batt & ESC were OK.