C-rating for boats question
#1
C-rating for boats question
The Mrs. bought me a ShockWave 26 V3 BL RTR, so far i'm very happy with it being my first boat. At first i getting used to it i ran my 2s race packs, that got boring fairly quickly. My local hobby shop had a battery sale so i picked up a Duratrax 3s 25c 5000, a week later i snagged a couple of used 3s 30c 5000 Tenergy packs from a fellow racer. I hadn't ran it for a week or so and noticed the new Duratrax pack puffed, not horribly bad but noticeable. So here's my question, all 3 packs get warm, not hot. I always balance charge and storage charge after the packs are cool before storing, is it pulling that many amps to puff that pack? Is 5c really that much of a difference in a boat? Or did i just end up with a bad pack? I would have just posted this in the boat section but there really isn't that much activity there. Thanks
#2
Tech Lord
iTrader: (252)
Boats pull lots of power so the higher the c rating the better. I tried some 25 c's in my stilleto at first and first run they puffed a litttle. From what I can tell c ratings are not all that accurate. I ran some zippy 25c batts in the same boat and had no issues at all.
#3
Tech Adept
Boats pull lots of power so the higher the c rating the better. I tried some 25 c's in my stilleto at first and first run they puffed a litttle. From what I can tell c ratings are not all that accurate. I ran some zippy 25c batts in the same boat and had no issues at all.
A battery is a chemical process so it won't be the same every time and experiences may differ with the same product.
For boats you're indeed better of taking higher C values, 45C batteries would sure do the job. It's more expensive to replaced puffed batteries than to invest a bit more in better batteries beforehand.
Please be careful with puffed LiPo's, you'd think it won't happen, but they do really explode..
#7
Tech Adept
His entire F1 burned down and he had 3rd degree burns, simply because he held it for 2 seconds before he dropped it.
#9
Tech Champion
Somewhat semantics I suspect. Going by the most literal definition I don't think lipos actually explode like a nimh can. But if you've ever seen a lipo go off, they can very quickly throw off quite intense flame and lots of nasty toxic smoke, it's very easy to relate it to an explosion. And yes burn up a car and anything in the general area.
+ on boats needing really good batteries, boats are typically a high nearly constant load. Suggest being especially careful with run time / ending voltage, as lipos tend to heat up more as they approach discharged when under a high constant load.
+ on boats needing really good batteries, boats are typically a high nearly constant load. Suggest being especially careful with run time / ending voltage, as lipos tend to heat up more as they approach discharged when under a high constant load.