Pros: Battery has handled multiple cycles with no issue.
Price is much less then what it would be to purchase locally.
I was able to fit it sideways into my RC18R giving it super human power. Thing flips over at full throttle due to all the power.

Cons: Make sure you have something to balance the cells.
LiPo can be dangerous, especially in tiny cars hitting 60mph.
Had to buy Deans plugs for my car.

Other Thoughts: The price on this battery is just awesome! I've ordered a few extra to build external 12v power supplies with.

Bottomline: Great quality battery that has dealt many times with being dragged behind the vehicle. Writing this review before I go ahead and buy another 2.

Pros: I currently use these on my Trex 450S and they have been performing very well. They seem to have a good punch to them and I have about 12 cycles on each battery and they still seem pretty strong. The build quality is good, they have a piece of foam at the bottom for those crashes and they have a dean's connector already installed which is nice.

Cons: I have about 12 cycles on each battery. I bought 3 and all of them are working ok so far. I'm hoping to get at least 80 cycles off of them and they would be totally worth it. I'm currently having balancing issues with the lipos but I think it's my charger that sucks.

Other Thoughts:

Bottomline: Buy 1 and try 1 and let us know how it worked for you! If you get over 80 cycles on them let me know!

Pros: once again, like any other mystery brand battery, this one ranks as the cheapest i have found anywhere. it fits right into the belt cp and trex compartments perfectly. the original batteries we were running were 1800mA and the helis' ran tail heavy. this battery has more weight to make the COG perfect. i have ran mystery batteries on my planes also and they do last a while. with today's economy, i really dont consider powering any of my rc stuff with more expensive batteries unless i am professionally competing of course. but i fly for fun and these batteries power that fun.

Cons: i really dont have anything negative to say about these batteries except that my friend and i bought a total of four of them and i was hoping to get some kind of referral Dx points for 3 of them that he purchased

Other Thoughts:

Bottomline: i would definately purchase these again. kudos to dXtreme for carrying a line of reliable and very affordable products like this to power my rc toys. there is nothing more annoying and frustrating that equipment failing and causing you to crash. i have total faith that this battery will not ruin your day. its just as reliable as the other mystery batteries i have been using for over a year now

Pros: These batteries have great power and long life.

Cons: I have found no negatives with this battery

Other Thoughts: I have owned these batteries for about five months and I only have good things to say about them. I use them in my T-rex 450 with a 430xl motor witch can pull up to 35+ amps. Upon opening the package which was very nice by the way they give you the impression of being made by a place that knows what they're doing. The ends are sealed with silicone and the shrink wrap and wiring or all done very nicely. I have a couple of Protek battery packs, which are excellent batteries by the way, and their construction is almost identical. I have owned the Protek packs a few months longer and they seem to have slightly more endurance than the mystery packs do. But you have to keep in mind that for the price of one ProTech pack you can buy almost two packs of the mystery brand. Like I said before I can tell that my ProTech packs are of slightly higher quality but honestly you will probably go farther on 2 mystery brand packs

Bottomline: Unbeatable value.One thing that I would like to add is that I have discharged these packs over 100% many times, but never below 9.5 V. In the beginning many times I put as much as 2350mah back into my Mystery packs with my thunder power charger. And that never puffed and they barely even became warm. That was in the beginning and now I only discharged them down to about 70 to 80% and they still are going pretty strong with 9-10min. of flight.