[orso76]

I had the same problem with my DX2.0/SR3000 and Mamba Monster (V2/V3).
I solved with the Spektrum Voltage Protector SPM1600:

http://cgi.ebay.it/SPEKTRUM-SPM1600-...3286.m63.l1177

http://cgi.ebay.it/Low-Voltage-Prote...3286.m63.l1177

http://cgi.ebay.it/Spektrum-Voltage-...3286.m63.l1177

...on Ebay there are many

http://www.spektrumrc.com/Products/D...ProdID=SPM1600



Ciao,

Lorenzo