2pcs 5000mAh 6S Lipo Battery EC5 50C-100C Soft Case 22.2V RC Lipo Battery Compatible for RC Quadcopter Airplane Car Truck 500 600 Helicopter

I now own 8 of these batteries. I use with my 550x, 580 Raw, and T-28 2.0m. Haven't had a single issue with these batteries. Hence why I bought more and more. They work. And if you know how to properly use, charge, discharge, storage, etc. You shouldn't have an issue either. READ THE MANUAL! I'm not smack 3D these batteries so I can't speak on that. But for sport flying, they work great. And somehow on the T-28, I'm getting 13 min flight times on a single charge. That's 7000mAh flight times with a 5000. The 1st set of 2 I bought was almost 2 yrs ago and haven't swollen or lost longevity.

Got a pair for my TREX 700X Dominator 4 years ago. My most recent flight was over 5 minutes and still had 53% charge left so I'm not gonna complain. Stored them at 3.7 volts/27% when not in use. No noticeable puffing. Treat them right, they'll treat you right. Just ordered 2 more.

Excellent battery and an excellent price! I own batteries from all types of vendors. These batteries are as good if not better than any of the other high-priced batteries I have purchased in the past. I have spent up to $130 for a six cell 5000 MAH battery and these batteries? They hold up just as well if not better… Very happy with my purchase. What is even better is I got the three-year coverage on these batteries so if they ever go bad I will get a replacement. It just doesn’t get any better! Thank you Amazon and thank you to the seller.

I have four of these batteries and have only put a few cycles through them. I have had excellent results so far, considering the low price, in my TREX 550s. We'll see how they do over the tail end of this season and into next. Cells were perfectly balanced at a storage charge upon receipt. Packaged well and in perfect shape. I don't expect discount batteries to last as long as premium, but I am pleasantly surprised so far.

Quality product at a reasonable price. Recieved within a few days.

First off, I fly RC Helis. I have flown them for the past 10 years. If you're familiar with RC Helis, you know you need good performing lipos with a constant high discharge rate. I have lots of experience with Lipos and at this point very weary of cheaper brand of Lithium. But there has been those few occasions where I have come across that rare purchase of excellent quality and decent price. This review is only of my INITIAL impressions. I would love to write a full review, but it simply can't be done without a long term experience a set of lipos. I have literally had lipos for 4 or 5 years until they started showing serious signs of wear. A lipo can last a long time as long as you don't abuse them. You know what I mean if you have experience with Lipos: keep them stored at 3.85v/cell preferably in a cold environment or below 75 degrees F, don't over discharge them (below 3.7v/cell), don't over charge them (over 4.2v per cell), etc. Again, anyone who has experience knows how to care for Lipos. If you don't care for lipos, then it doesn't matter the quality, you will destroy them prematurely - like a car, don't change the oil, etc. regularly, doesn't matter the make, it will die prematurely. All that being said, the great news is these batteries came nicely packaged and perfectly balanced at 3.85v/cell. They come with EC5s the same connector I use with long balance leads. No dead cells, and a low ir (internal resistance). Everything you could ask for on the bench. I have so far flew these lipos twice. That's why this review is my initial impressions. I will amend it later, and perhaps next year as well. For both flights, it was on my Goblin 700, a 12S setup with a moderate headspeed of 2200rpm with 716mm blades. I fly moderate 3d, but didn't really push it too hard, as you need to break the lipos in, but good performance. Flights were 4 mins 10 secs each, and the lipo's voltage came back at 3.78/cell. Excellent. Performance was snappy and no sluggish behavior, power was there when I called on it. But as I said, the real test is the long term because even if these lipos perform great for 100 flights this season but then degradge next season, it would have been a total waste. Any good performing well known brand (Thunderpower, Pulse, Gensace) 5000mah 40c 6s Lipo would cost twice the price; however, they not just perform well, they last. So even if I pay twice the price for a set of Pulse, but get quadruple the longevity, I still lose out in the long run. These lipos appear to be relatively new to Amazon, so I still think the jury is out on them. This is why I only bought a single pair. If they turn out to appear to be good for the long term, then i have no problem buying several more.

These are great batteries after 2 years of use still solid.

I've gone through several of these. No lipo lasts forever, but these perform quite well and good power output for the weight. I've used them in warbirds and EDFs, and they are my "go-to" brand for 6s-5000s -- having them available with the EC5 plug is a big plus for me.