Did I F$£k up?

[mummi]

I got my battery and chargers yesterday. And noticed that it says that it charges 2 & 3 cell batteries but my battery is 15.

http://db.tt/3SjU8smZ


Can I use theese chargers with this battery?

Sry I am new and have read a few frightening articles on lipoly fires

[chris ables]

11.1 v lipo's are 3 cell ! 15c is the discharge rate of you batteries and not how many cells ! The c after 15 does not stand for cells ! The s after nimbers on a lipo stands for how many cells ! Your battery should have 3s on it somewhere ! Anyway 7.4v is 2 cell , 11.1v is 3 cell ! Normally lipo's are 3.2 - 3.4 volts per cell so you can figure out how many cells by the voltage of the battery ! That 15c means the amperage of the battery is 15amps output continuos ! You might want to get at least 20 or 30c batteries because they put out more amps ! I run 45 to 50c batteries ! Hope this explains your question !

[wilco1967]

I got my battery and chargers yesterday. And noticed that it says that it charges 2 & 3 cell batteries but my battery is 15.

http://db.tt/3SjU8smZ


Can I use theese chargers with this battery?

Sry I am new and have read a few frightening articles on lipoly fires

You're OK.....

that charger will do just fine, though rather slow.....(expect about 2.5 to 3 hours to fully charge that battery).
You will have to power the charger from a car battery or similar 12V Source. An old desktop computer power supply can be easily modified to provide 12VDC

The 15 on the battery is the 'C' rating, meaning you can theoretically draw your battery empty in 1/15 of an hour (4 minutes).... that is the fastest that is theoretically allowed.... you should limit your amp draw so it will at least last double that time....

Seems like your new to Lipo's....
Just remember: DON'T draw your batteries empty !.... you WILL damage them quickly if you pull them down too far.

Your ESC should cutout if they are nearly empty, but it is better to stop flying AS SOON AS you notice the power goes down.... Remember how long that took you on your initial flights, and set a timer on the next flights slightly shorter.... the low voltage cut out of the ESC is already kind of late... Better to stop before it cuts you out.
So if you noticed after 10 minutes of flight, the power got less, or the ESC cut out, then set your timer on your next flights to 8 minutes.... that gives you a nice margin.

BTW, What are you flying ?

Good luck !

[mummi]

Hope this explains your question !

It does thanks

BTW, What are you flying ?

Good luck !

Nothing atm, I am putting togeather an F450 quad kit from rctimer hope I wil be up and run.. Ehh flying after the weekend I still need a few plugs and this weekend is a holliday weekend here nothing open until tuesday

[mummi]

you should limit your amp draw so it will at least last double that time....

And now for the noob question of the day... How would one do that?

[chris ables]

you should limit your amp draw so it will at least last double that time....

And now for the noob question of the day... How would one do that?

Things that can reduce amp draw are smaller props , smaller motors or smaller kv motors , and lighter weight !

[chris ables]

Mummi read this link about lipo's ! Especially about the c rating ! http://www.rchelicopterfun.com/rc-lipo-batteries.html

[mummi]

Mummi read this link about lipo's ! Especially about the c rating ! http://www.rchelicopterfun.com/rc-lipo-batteries.html

Awesome thanks!

[tovrin]

http://www.ecalc.ch/xcoptercalc_e.htm?ecalc
there is a good tool i use a lot too! will tell you exactly how much amperage your using, as well as a plethora of other good multirotor info.

[chris ables]

Mummi read this link about lipo's ! Especially about the c rating ! http://www.rchelicopterfun.com/rc-lipo-batteries.html

Awesome thanks!

Be sure to also whatch that video on that page ! You might want too store those lipo's in a firesafe ! Had a friend loose a shed !! your welcome !