(2 year plus update) ZIPPY Flightmax 4000mAh 2S1P 25C Car Lipoly (ROAR APPROVED)

Original post ( June 15, 2013 )
After 2 years I'm happy to say. I have had a great experience with these batteries and for the money they have been a great battery . 

Originally I purchased 2 of these and they have both been comparable and aged equally in terms of usable capacity and punch . 

Usable capacity has dropped off as time has gone on and they are both down to about 2200 Mah worth of usable capacity when ran in my ZD Racing zmt 10 compared to ruffly 4000 Mah usable capacity when they where new . The primary difference is the voltage sag during use . Basically the LVC of the speed controller will get tripped much earlier due to the dip in voltage . Without a load the battery will read around 6.84 volts but with a load applied a 6.2 volt LVC will trip. So these batteries are now being used primarily in slower and less amp hungry applications  where they still preform quite well and when matched with the right application " crawlers and low powered vintage stuff "can still provide about 3500 Mah . The packs still maintain there balance well no matter the rate they are discharged at and still do not require balance charging often .

So if your chassis design will allow you to use these packs I consider these my top pick for low cost and effective Lipo's.