lipo battery and charging c rating

[fescue101]

i was wanting to know if my battery is a 45 c 5000 mah and says it can be charged at 10c. how many amps can i charge at safely? i always thought if it was 1c charge rate it meant you could charge at 5.0 amps but that would mean at 10c it would be 100 amps. i know thats not right so please help explain at what amp to charge my batterys at and why? thanks

 

[MR4X4KING]

1C or 5 amp for that battery

1c is normally the rule of thumb but some manufactures or batteries say higher

i do all my lipos that way 1c
but my chargers only go to 5 amps or 6 amps
so when i charge my 8000mah or 10000mah batteries i charge them at 6 amps
they just take a bit to charge

 

[fescue101]

so when my battery says charge up to 10c = 100 amps is this right? my charger only goes up to 6 amps but I'm just asking because that seems crazy!

 

[slowngreen]

Charge them at 1x the capacity. So 1A for 1000, 3A for 3000, 5A for 5000 and so on.

 

[jtboogie]

4x4king, where can I find a 8000 or 10000mah battery. I have never seen anythign over 5000mah at my LHS.

 

[HPIguy]

so when my battery says charge up to 10c = 100 amps is this right? my charger only goes up to 6 amps but I'm just asking because that seems crazy!

10c for a 5000mah pack would actually be 50amps, as 5000mah = 5amps x 10 = 50amps. I would never charge at a rate this high. Even on good cells like Hyperions that are rated for 5C charge rates, I never go over 2C and that's usually only at the field. At home I generally stick to 1C rates. Following this method along with regular balancing my packs live a long healthy life.

 

[MR4X4KING]

my 7.4 8200 mah i buy from
http://www.spcracing.com/index.php?productID=61


i run these in the summit and they last about 45 minutes to over a hour and 15 mins if crawling

the 7.4 10000 mah i get from

http://www.hobbypartz.com/98p-40c-10000-2s2p-hardcase-direct.html

---------- Post added at 10:51 AM ---------- Previous post was at 10:49 AM ----------

i have never seen a battery that says charge up to 10c

i have seen up to 5c

who makes the battery post a picture up

 

[Greywolf74]

I agree with what everyone else is saying here. 1C is always a safe charge. Some manufacturers claim that their cells can be charged at higher rates. Some claim 2C, 3C, 5C.....and apperntly 10C now. I have never seen one that claims 10C. I personally wouldnt do more than 1C if your not in a hurry and 2C if you are in a hurry. Most chargers wont do much more than 6-10 AMPS anyway.

@jtboogie lots of companies carry lipos bigger than 5000 but usually once you start getting up over the 5000 range and especially past about 5500 usually what you gonna run into is a pack that for example instead of have 4 cells run in series, has 8 cells (Two sets of 4 cells run in series and then both sets run in parallel). So it essentially 2 batteries run in parallel squeezed into one case. This is signified by the 4S2P designation where a normal pack would say 4S1P. When you get into those parallel packs the big thing to watch out for is size. they are gonna be bigger than a standard 4S so make sure if you buy one your kit can hold it.

 

[jtboogie]

Thanks for the info grey. Right now the rigs I have only run on 2s and 3s and the largest mah capacity one I have found in an hour or looking around on the net is a 6500mah and i saw that it said 3s2p so now I know what you were talking about. The only higher mah ones i saw were the ones 4x4king posted but I didn't see the 1p or 2p in the description. I have a duratrax onyx 5000mah 2s and in my rc10 t4 it seems to last close to about 45 minutes which is really fine by me but eventually I am sure I will be looking into getting a higher mah one.