I have been racing a long time but this coming weekend will be my first crack at Lipo in my EDM. I got out my new, one, battery tonight to charge but could not get the job done. I know I am probably doing something stupid because I have have zero experience with lipo. Something about teaching old dogs new tricks...

Anyway I am trying to charge the Lipo on my GFX I just got back from getting the Lipo update.

The battery I am using is a Checkpoint 5400 mah

I bought the team checkpoint balancer as well.

This is what confuses me. The battery is a 2C but yet the label on the battery says to charge no higher 1c. The GFX Lipo instructions state to charge at 1c unless the manufacter says otherwise. If the battery is a 2c why charge at 1c? What am I missing?

Anyway I set my GFX to charge 1c and turned the mah to 5400. I put the balancer in-line per the instructions and made sure the balancer was set to charge mode and the 2c indicator light is on.

I hit charge for the first time already to charge my first Lipo and the following error came up on the GFX "High Voltage Error". The volt meter on the GFX reads 7.61.

Now I realize the the battery is a 7.4 volt battery and my charger is reading 7.61 which tells me maybe the battery has come already charged. If this thing has held a charge that well sitting on the shelf in the package... Then damn am I impressed. With that being said, most of my traditional packs peak well over 9.0 volt so why would the Lipo not take a charge at only 7.61 volts?

Should the charger be set to 2c? What am I doing wrong?

Thanks in advance for any help.

The battery is a 2c, meaning 2 cells. 1c refers to the MAH 5400=5.4 amps.

the LiPo will peak at 8.40 volts, and then the GFX will reduce the amps gradually in what they call a top mode. Right before the charge finishes, it is charging at around .25 amps

Harold when you get to the Mill Saturday we can go through your stuff. I've been using the Lipo for since Coopers and love it. I'm using the Checkpoint charger but the GFX should work much better.

Glenn

C rating is not the number of cells. :) Cell count is expressed in a number followed by "S", like 2s = 2 cells. "P" is used to express how many cells are in PARALLEL. So you might see, 2S2P. That is 2 cells with 2 parallel. That would be for a 7.4 volt battery. If you saw 3S2P, that would be for a 11.1 battery. :)

C rating:
http://www.batteryuniversity.com/partone-16.htm

This is some good reading:
http://www.batteryuniversity.com/partone.htm

Thanks for the Homework, Gezer LoL
Hows Josh doing?

Your Welcome!

He's going to San Francisco State. Now he's home for the summer. Maybe will get to do some racing. We have a new carpet track about an hour from us. After traveling 2 or more hours to race It's like it is in our own town. lol