Re: Nicad RX pack

- D
- Doug McLaren
  
  Contact options for registered users
posted
19 years ago

Thu, Sep 23, 2004 2:12 AM

| What is an average voltage reading without load for a fully charged 4 cell | Nicad RX pack?

Freshly charged, with no load, the usual voltage of a single cell is about 1.4 volts. So your 4 cell pack would be about 5.6 volts.

HOWEVER

You may already know this, but a almost completely *discharged* pack may also show about 5.6 volts under no load. If you put it on a load, it'll drop a lot, but take the load away, and the voltage will creep back up, often very clsoe to that 5.6 volt figure.

So don't rely on the `no load' voltage for anything important.

- M
- Mark Miller
  
  Contact options for registered users
Vote on answer
posted
19 years ago

Thu, Sep 23, 2004 4:10 PM

snipped-for-privacy@frenzy.com (Doug McLaren) wrote in news:Biq4d.25992$ snipped-for-privacy@fe1.texas.rr.com:

Well, don't rely on it for state-of-charge information, but if you have a freshly-charged pack that shows a no-load voltage of, say, 4.1V, you can count on the fact that there's something seriously wrong with the pack.

- J
- John R. Agnew
  
  Contact options for registered users
Vote on answer
posted
19 years ago

Sat, Sep 25, 2004 6:29 PM

The no-load voltage doesn't really matter. According to the instructions with my Hobbico digital voltmeter, a freshly charged 4.8v battery pack should not read below 5.40v under load. You can fudge on that a little bit, if you fly that battery regularly and are familiar with it, but the rule will keep you out of trouble. It certainly has worked for me.