Holton50

how do i check the charge of a 6 cell battery? like what do i need to check it?
thanks
Chris

Scar

My Feedback: (3)

I'm interested in what you're using a 6 cell battery for. If you were posting in the Electrics forum, I might think you were using a 6 cell power battery with an ESC to feed your receiver.

However, it sounds like you're looking for an expanded scale voltmeter, as is used for receiver batteries. I don't know of one that has a scale for 6 cell batteries.

You can check Red Scholefield's Battery Clinic web page, to find out how to make a load voltmeter setup for your particular application.

Or, you can use a discharger / charger unit that measures mAh (a "cycler"), to determine the condition of your 6 cell battery.

Good luck,
Dave Olson

Holton50

i have a 2700 mill amp batery in my great planes patty wagstaff on the reciver

Campy

My Feedback: (1)

Do you mean "6 CELL" or "6 VOLT" ?

If you mean 6 VOLT, your field voltmeter SHOULD have a switch or jack position for a 5 cell battery.

Holton50

6 cell, 2700 battery

Scar

My Feedback: (3)

Okay, so you made the decision to use a nonstandard battery on a receiver.... I'd be interested in what went into that decision.

I am not aware of loaded voltmeters available with which to check your 6 cell receiver battery. I recommended before that you look over Red's treatment of measuring amperage and current, and create a method to satisfy your needs. I'll stand by that, except now I'll suggest that you revisit the decision to use a 6 cell battery on your receiver.

Best wishes,
Dave Olson

redfox435cat

this isn't a good idea. You'er going to burn up your radio gear with this, They are not like eletric motors were you can throw almost as much power as you want. They were desighned for 4 cell operation and tolerate 5 cell. But it's your stuff, go with it

Any volt meter will tell you the voltage. The only way to get ballpack capacaity is to use a computerized charger that calculates the relative charge rate over time after a near comlete drain, i.e cycle mode.

my 2 cents

Kaos Rulz

Fastdyno


I'll bite.

Why are you using 7.2 volts for a receiver? Unless it's regulated to 4.8 to 6.0 volts, you're over applying voltage.

RC4LIFE

Sorry...dad gave Fastdyno bad information....It is a 5-cell/ 6 volt battery....

jaka

Hi!
There are several battery checkers (both 4,8v and 6v) on the market.
Here are a few.
Regards!
Jan K
Sweden

Campy

My Feedback: (1)

Your regular field voltmeter should have either a switch or bananna jack position for 4 cell and 5 cell batteries. The scale should also have 2 markings. Just be sure to use the correct switch/jack position and read the proper scale on the meter.

davidsai

hi guys i am using 5 cell 6 volt 600 mah batteries, which go from max charge to 4.6 volts in an avergae time of 70 minutes, whichi think means i can fly at least 50 or so minutes
am i rgth or wrong?
regards
david

Gringo Flyer

My Feedback: (18)

I would think that is cutting it a little close. Its a better rule of thumb just to check voltage under load after a flight. That is better than just setting a set time for flying on a pack. A 600 5 cell pack is small on a standard size plane. A 6 volt pack a t 600mah gives you less t¡run time than a 4.8 volt 600 mah pack. So unless you have this pack on a small plane with micro servos you might want to look at a bit bigger of a pack or at least check voltage after every flight.

Also I dont think that 4.6 volts is possible on a 5 cell pack. A battery is completely dead at 1.1 volts so on a 5 cell pack that would be 5.5v.

Maybe on your voltmeter it has 2 bars and the 5c voltage is above the 4 cell voltage and your are just reading the 4 cell voltage number.

ccs77

Since this thread is about 7Volt batteries I was hoping I could get some suggestion on charging methods from you guys. I have a charger tha has a variable Amperaqge for charging. Is the default setting of 3amps ok? Also how long shoiuld you charge a new 6 cell 7.2Volt battery for? Would the standard fast charge and 5omin trickle be sufficient? I cvan;t seem to get it to keep a charge for very long and it's brand new...

Rodney

ccs77, sounds like you are abusing your batteries. Did you do the proper forming charge (at least two preferably 3 cycles of charging for 15 hours at 0.1C with discharge between cycles at 0.2 to 0.3C)? If not, you should still do this after first discharging them to .9 to 1 volt/cell. Check out Red's site at www.rcbatteryclinic.com for some good advice on the care of your batteries.

ccs77

Crap...I had no idea I had to do all that. I had better get a diferent charger then...the one I have kinda does everything automatically, and I'm to stupid to go in and change it...I think you can change settings, but the instructions where very vague and said that that was for "experienced modelers".