pilotmikey96

i brought this new li-po 1250mAh 11.1V battery from the local model shop and ive charged it up but when i put it inside my aircraft (cessna ep 400 CML) it makes a strange noise, the rudder struggles for a while then everything jams to the right? the wheel is attached to the rudder so that jams right too, and after that, nothing moves , cant figure out whats wrong with it, it cant be the aircraft because it works perfectly on the origional battery so i thought id ask around before taking it back to the shop.
thanks
michael

Whathappened

It sounds more like a receiver problem than a battery problem.

pilotmikey96

thanks for the reply
it works on the other battery just not on this one, dont see how it can be the reciever?
michael

mpotter187

Have you checked the battery with a volt meter? First thing I would do is check for low voltage on the pack, that could very easily cause it to go crazy, or maybe a short in the pack that would give a strange rating.

Is the pack puffed at all or damaged any way? Have you tried your old battery since you have used the new one does the problem still go away?

In any case I would store the pack outdoors in a fire proof container just in case there is a short or other damage since there is a chance the damaged pack could catch fire. Advise the local model shop that the pack is potentially damaged as well when you return it.

pilotmikey96

i did try the other battery straight after to make sure i havent broke my airplane and it works perfectly.
il check it with a voltmeter as soon as i can and i will store it in the shed for now.
thanks for the reply
michael

mpotter187

No problem, I would take your stuff to the hobby shop and show them what it is doing with the new and old battery, since clearly it is at fault.

They should replace the battery for you without much hassle, I would even test the new before you left.

pilotmikey96

i have took it to a different model shop from the one i brought it from for volt testing and the voltage is unusualy low and it seems not to be charging, the person at this model shop said take it back to the shop i got it from and ask them for a new one, so im going to go there tomorow and get it replaced it should be coverd by warrenty
thanks for all your replys
michael