Originally Posted by mac853
In the case i had asked this question before, unfortunately nobody answer me.
Could anybody help me to choose, at least give me the advise for this "strange" situation.
There are allowing LIPO and NIMH running together, but with different voltage and motor power.
But i don't know which kind is better for me, even not sure if LIPO is the good choice with these kind of race rules, then i guess we have no weight limits:
KV, Voltage, RPM
6200 (6.5), 4.8 v(4cells NIMH), 29760
4600 (7.5), 6.0 v(5cells NIMH), 27600
4000 (11.5), 7.4 v(Lipo), 29600
Just give me a little opinion to make a choice, please.
Originally Posted by Drifting101
If i were u i would go with 11.5 and lipo
Originally Posted by mac853
In the case i just own 4200 sho batteries, since there you insisting to convince me using LIPOs?
Then, which 1 of LIPOs run well in spec races?
I am miss something, not only 11.5, even 4000kv is accepted.
How about if i try LRP 10.5 stock spec, any good?
I am not sure if Orion 10.5 has just 4000 or higher, could naybody confirm this, please?
Well as i wear both of this technology, it all depend :
Do you race or no
if you do race Use Nimh for now,
if you do not just race, you'd better use Nimh,
if you are just having fun and wanna feel the best technology
youd better Used Lithium Technology
There is more of This Lithium Technology
Lithium-ion , Lithium Polymer (LIPO), Lithum Manganese.
Yet LIPO and LiManga is better in capacity
and Lithium-ion is easy to do overcharge.
you should coose between them, since you decide for an expirience.
Other than that is Lithium Capacity,
wich is depend on your technology Engine (ESC and MotorDrive)
since you had this stock brushless tech, i quote 'LRP 10.5'
For Lithium 4600mah capacity it has been quite better than
Nimh 4600mah, since you are wearing Brushless, wich is Super efficient,
and Lithium 4600mah is more lighter than Nimh 4600,
this will reduce the cost of power at your car,
you will feel better acceleration (not just top speed), because less weight.
So even with the same capacity, you will steel feel the diffrent between them. for the same Motor tech, at almost equal Voltage 7.2for nimh and 7.4vfor Lithium.
wich Lithium on you motor will generate more RPM rather than nimh.
after you understand this there was another Unique problem on Lithium it is
caled density, Lithium had great in Density,
Pick any of Lithium by 'C' rate some is 25C or more,
it is important when in the future you would like to upgrade your MotorDrive
to such 9.5 8.5 or so,
'C' Rate mean how many time to Draw your Current
example : you had 4600mah of lithium capacity x 25C = 115000mah
it is called maximum Dischage capabilities,
while some motordrive stock class capable to reach Draw 100amp
then this battery will be required.
example : you had 4000mah Lithium x 25C = 100000amp
this mean you can only draw you Battery to maximum 100amp
wich is pushing the limit of you battery, on some case you will need more than that, thats why 4600mah is minimum requirement for now.
There is also so caled 'Burst rate' also 'C'
but Burst rate is happen only once for example 10-20 second
example : Lithium 4600mah 25C Burst 30C
meaning when you punch your car start from zero speed, it will be able to push your battery to 4600mah x 30C = 138000mah (138amp) for 10 second,
meaning better initial acceleration, rather than Normal Rate 115amp.
once again depend on you MotorDrive capabilities.
Burst rate can be re used when the battery rest on maximum normal rate
or less, on some time, this is the habit's of the Lithium.
So Choose Lithium Wisely by Normal Rate and Burst Rate.
note: on aeroplane of Heli rc this Burst Rate is required to push the craft up to the sky high.
So Find Lithium not just by it's Capacity,
but watch the C Rate and C Burst Rate.
if the Product doesnt show The C Rate Do Not Buy them, you will waste money.
C list 5C , 15C, 25C, 30C, or more depend on the technology today.
Capacity for 7.4v even 10000mah already exist, perhaps today there is more.
Now if you are willing to raise you RPM used more then 7.4volt just for fun on your 10.5stock, but if you change your battery more than 7.4volt you will required suitable ESC for Lithium, some Of ESC that capable to work on 14.8volt lithium. watch this it is verry important before you would like to used Lithium Technology. any Aircraft Electric already used this kind on ESC.
Charging Capabilities, Lithium is only can be Charged with Special Charger For Lithium Only.
Important Better Used Lithium Charger With Lithium Balancer, This will make your battery Last Longger and Keep it Performance.
Lithium Only Can be Charge for 1C , meaning one times it's Capacity
if you had 4600mah of lithium, Set Your Charger on 4600mah only. not more than that,
Only Lithium ion can be charge litle bit more than that, about 1.5C. for safety.
Brand, im sure you can handle this later, because, Lithium is so Easy to build by many Companies, after you Understand all of those above, you just pick any Brand you can trust.
Big Note before you all try Lithium, there is called
Super Charged ion Battery,
this Technology is verry New, and it will required to Charged 5 minutes only.
who invent this, it is Toshiba.
it is safety even with crush, and hight temp 99degree the battery wont explode, and still keep up the performance voltage.
Watch this one