[Azathoth]

I have an interesting problem.

My gear
1 Stock TM M4 S System
1 Sanyo 8.4v 600mah NiCD – 7 cell
1 Intellect 9.6v 1100mah NiMH – 8 cell (I know it doesn’t fit, I’m rebuilding the pack)
1 Intellipeak mini pulse charger Link: http://www.duratrax.com/caraccys/dtxp4100.html

I tested the batteries when they arrived and it had approximately between 2/3 and 3/4 charge remaining. I saw this as a good opportunity to condition the battery before use and test my AEG.

My short term plan is to relegate or replace the battery almost immediately as 600mah just isn't enough.

Anyways back to the problem. I connected the Battery and test fired the AEG on Semi. All is perfect. I then test on Full Auto. Again all is perfect. I take a little time to adjust the sites and hop-up, and repeat my test firing until both batteries gives out. I'm satisfied that the AEG is in working order and I proceed I plug in my battery to charge.

I charge the Sanyo for 7 hrs on the slow charge. I don’t bother testing the battery and proceed to connect and test AEG/Battery.

Pull trigger and nothing, not even a little effort from the box. I assume the battery hasn’t been sufficiently charged and check it. Upon connecting the battery to the tester the volt meter goes backwards into negative territory (yes +ve to +ve, -ve to –ve). I reverse the connectors +ve to –ve and it shows a ~80% charge.

So what now? Have I fried the box? Did I Incorrectly charge the Battery? Do I have a bad charger?

Any help would be greatly appreciated.