Which ones would you choose?

[jamespl]

I currently run zippy 5900mah 60c hardcase 7.4v in series in my pursuit 4074 2000kv t180 and just upgraded to an m445 prop but I read in a thread that they aren't that good a pack due to the bullets that connect into the hardcase so would I be better trying these?
http://www.hobbyking.com/hobbyking/s...atible%5F.html
I use ec5's on battery to esc and 6mm bullets from motor to esc. The ec5's get rather hot and I don't think I'm over doing it prop wise and the 60c packs should be able to deliver what I need.

[siberianhusky]

For starters ditch the ec5's especially if they are getting hot, that should tell you something right there!
There was some very good battery testing done on here in the last year or so by Diesel. The standard Turnigy packs turned out to be better than the Nano-techs.
For budget batteries he found Gens Ace to be pretty good.
I started out buying the cheap batteries from China, I have one 2s pack left. I then tried one set of Gens Ace and they are still working OK on discharge but now one cell takes a lot longer than the rest to balance. So I'd say I got 2 seasons out of them. My Enerlands bought at the exact same time are still working like new.
With batteries you really do get what you paid for, I would have been further ahead if a few years ago I had bought all quality batteries.
I'm sticking with Enerland, Hyperion or TP for now. People are having good results with Haiyin and Dinogy but I'll wait a while to see how they last in the long run. My Gens Ace started out great but haven't lasted too long.
I don't have any high amp setups, in fact everything I run is powered by Proboat or Aquacraft motors. So it's not like I'm pulling max amps on every run, highest I've ever recorded is 109 amps, my batteries always come in barely warm to the touch. None have ever been run down until the LVC kicks in, always time my runs so the packs have about 3.7v at rest when I'm done a run.
With a good charging setup I can run all day on 3 sets of batteries with no waiting for batteries to charge, I can keep rolling through them.
Quality batteries do not need to be balanced with every charge, I bring them down to storage voltage when I'm done running, balance charge them all before I head to the pond, then just do regular charging at the pond.
My good packs always finish a run within a few millivolts of each other. The internal resistance of the better packs I believe is much closer than the cheap packs.

[jamespl]

The packs themselves don't get overly hot just the connectors. Yesterday was my first time running with the m445 I normaly use an x642 and the ec5's still get quite warm but not as bad with the m445. Mabe I'm running too long, about 5mins. It was quite warm for uk weather yesterday too. About 23deg. Plus I'm kinda limited on battery choice in the uk, I only sport run so I don't want to pay stupid money for packs and I don't think you can get gens ace here.

[siberianhusky]

I only sport run as well. EC5 connectors just kinda suck! They are getting hot because the can't carry the current you are trying to put through them. The ONLY reason they'd get hot. Noting to do with runtime, they'd be at that temp within a minute anyway.
The way I look at it I can pay half as much for batteries plus shipping, then buy more plus shipping, then more again! Or spend the money once and get quality stuff that will last at least a few seasons. Like I said in 3 years all my budget packs have more or less failed, the quality ones are still running strong.
So in the long run the expensive packs have actually cost me less than the cheapies, I'd have to replace them all at half the price of good packs, then pay shipping again.
LMAO 23 is springtime weather! Try 30-34 out with 100% humidity! Our water is about 20-23! 7:33 AM and it's already 20 out heading for 30!
You can get enerland packs from Hobbyking now.

[jamespl]

23 is a hot day in the uk. Why do you think I'm going to cancun for my hols lol. I think I will try some HK 8mm bullets then. Should be more than enough!

[siberianhusky]

LOL I'd love a nice antarctic cruise right about now! Temps been 27-34 for the last few weeks, no rain and high humidity.
It's kinda funny, I started out with ec5 connectors as well, thought they'd be good enough and I couldn't short things out with them. Replaced them all. Well recycled them, I've had no problems using them as motor - esc connectors in what I run.
Same with batteries, now I've found I buy one good set a season and add them into the rotation as the " high speed pass" packs. Since they outlast the cheapies by a couple years of usually running twice a week my battery cost per season is pretty low. Until I decide to change to 6s or something!
With the way the economy is I can't afford to have things go up in smoke if I want to keep playing. I haven't put a new boat on the water in a long time!
Cheap, Fast or Reliable - Choose Two. SHould be the mantra of rc boating!

[sailr]

Personally, I will NEVER waste any more $$ on batteries from HobbyKing. Every turnigy pack I've ever had either arrived DOA or puffed very early. The Turnigy's are the worst.
I am now using the Haiyin packs which seem to be holding up really well. www.haiyinstore.com . The Gens Ace from Hobbypartz www.hobbypartz.com have gotten good reviews. I have used their Sky Lipos in my aircraft and they are very very good.

I currently run zippy 5900mah 60c hardcase 7.4v in series in my pursuit 4074 2000kv t180 and just upgraded to an m445 prop but I read in a thread that they aren't that good a pack due to the bullets that connect into the hardcase so would I be better trying these?
http://www.hobbyking.com/hobbyking/s...atible%5F.html
I use ec5's on battery to esc and 6mm bullets from motor to esc. The ec5's get rather hot and I don't think I'm over doing it prop wise and the 60c packs should be able to deliver what I need.

[martin]

I would deff ditch the ec5, Gens Ace are available in the UK from giantshark.co.uk or electriflyer.co.uk. I would also look at changing to 2x 4s in parallell to get much better selection of lipos than looking for 2s 5800mah.