What's My Optimum Charge for these Batteries? (Full Version)

All Forums >> [Radios, Batteries, Clubhouse and more] >> Batteries & Chargers

Message

---

Greyhawk -> What's My Optimum Charge for these Batteries? (6/28/2002 4:47:15 AM) 12 1.2v Nicads @ 1800 mAh. When they're fully charged what should the voltage read? When they are drained what should it read. Like your field battery 13v = fully charged, 12v = time to recharge. does that logic apply here? Thanks.

---

Red Scholefield -> What's My Optimum Charge for these Batteries? (6/28/2002 5:03:48 AM) Full charge, open circuit voltage reading 16.2 or greater. Open circuit voltage fully discharged, 14.4 or less. You would get a better reading if there was a slight load applied. Then anything under 13.2 would indicate full discharge.

---

thomasb -> Ooops! (6/30/2002 4:53:54 AM) [QUOTE]12 1.2v Nicads @ 1800 mAh. When they're fully charged what should the voltage read? [/QUOTE]It is not practical to tell if a NiCd is "fully charged" by reading its voltage. You can determine if it was recently on a charger though. NiCD's are not like Lead Acid's -- using the voltage method for determining full charge is a bit inaccurate. [QUOTE]When they are drained what should it read. [/QUOTE]As they are used under nominal loads (C/5), the voltage will spend the majoity of its time slightly above 1.2V per cell. When they hit 1.185 volts per cell, I stop flying. The battery makers use about 1.0V / cell (at 20 degrees C) as the cut-off, but that would be an insane no-fly level to use at the field. Red offered some good advice, but I do deviate a bit from what he said.

---

Page: [1] 1

SITE MAP!   : :   FORUM RULES © 2001 - 2007 24-7 RC, LLC, all rights reserved.

0.078125