How do i charge my lipo????? - RC Groups
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Jul 09, 2010, 10:07 PM

How do i charge my lipo?????

i have a pro peak sigma 2 lipo charger that i got at hobbypeople in lakewood california. i also have a hobby people 7.4volt 5000mah lipo battery. the guy at hobbypeople said,"this fucker here should last about 40 minutes." it only lasted about 10. and i think its because i dont know how to use my charger. right now i have a traxxas slash with a castle creations sidewinder 4600(motor and esc).

BTW: i lost my manual!
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Jul 09, 2010, 10:40 PM
Happiness is a belt fed weapon
Cleared2Engage's Avatar
Two things could be wrong. You might have inpropper gearing which would cause it to heat up and shut down or the battery isn't properly charged. Done properly that battery should last you at least 30 minutes.
You should be able to find the PDF manual online.
Jul 09, 2010, 10:58 PM
Registered User
ahh, exspensive lipos, but what charger are you using, if the battery is brand new, you need to charge it at half its amperage, so it will take 2 hours, so for a 5000mah u charge at 2500mah or 2.5a, also you need to make sure that on your charger it says 2s lipo, if it says 3s 1s ect, you will be damaging the battery, also is you balancing plug in its socket? if not u could damage the battery when you drive it, the balancing plug is the white plug that for a 2s lipo has 3 wires going into it, but to help, please tell us what charger you have and possibly a pick =)
Jul 10, 2010, 08:38 AM
Surface, Air & Water Rc Toys..
freechip's Avatar
Your charger looks exactly like the AC6 and similar chargers so what you are going to want to do is select LIPO charge by pressing the BATT type button. Then press enter and push the INC button to change the charging type to BALANCE then when you press enter select 2S and then increase the MAH to 5000mah and then hold enter to start the charge, if your pack is drained it will take 1 hour or so to charge.
Jul 10, 2010, 04:17 PM
Registered User
Originally Posted by slashPRE-RUNNA
..... right now i have a traxxas slash with a castle creations sidewinder 4600(motor and esc).

BTW: i lost my manual!

You can find the manual here - this is the 2wd version - all the other manuals are located here. Find your RC, then go to exploded view and that manual is there -
Jul 10, 2010, 04:30 PM
Surface, Air & Water Rc Toys..
freechip's Avatar
Since hes asking about HOW TO CHARGE I think it safe to assume he lost the CHARGER manual and not the trucks manual.
Jul 11, 2010, 04:28 PM
Registered User
That charger manual is not online, others have looked. One said he contacted RpiMax and they sent him a copy -

This manual would prob do in a pinch, these appear to be the same charger -last line center panel -
Dec 11, 2011, 05:45 PM
Registered User
after the first run of the charge, can u set the charge current to 5.0a?

also, im assuming 3s = 3 cells??

also, also, how do u know when its done?

Dec 11, 2011, 08:32 PM
Registered User
wparsons's Avatar
It will stop automatically when it's done charging. If it's a 2s pack, it will be at 8.4v, if it's a 3s it will be at 12.6v. If you're pulling it off the charger before it finishes, that definitely explains why you aren't getting much run time.
Dec 17, 2011, 06:20 PM
Registered User
Yes 3s is USUALLY 3 cells. A single cell is 4.2 volts when charged. Storage voltage is 3.85v per cell. After you get done running the voltage will likley be around 3.5 volts per cell.

Try to always use the balance charge if it has it.

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