Feb 27, 2007, 06:59 PM Registered User Canada, BC, Kelowna Joined Nov 1999 920 Posts Discussion Li-Po charging chart A few days ago someone post a chart that showed the voltages of Li-Po batteries above which these cells should not be charged. Can someone point me to that chart?
 Feb 27, 2007, 10:47 PM Fly it like you stole it.. Florence, Al Joined Oct 2000 29,399 Posts You mean something like this: 1 Cell 4.2V (4.18-4.22) 2 Cell 8.4V (8.36-8.44) 3 Cell 12.6V (12.48-12.66) 4 Cell 16.8V (16.68-16.88) 5 Cell 21.0V (20.90-21.10) Maybe that helps.. Jeff www.CommonSenseRC.com Latest blog entry: Wow.. 3 years..
 Feb 28, 2007, 08:43 AM Registered User Canada, BC, Kelowna Joined Nov 1999 920 Posts Thanks for your reply Jeff, however the chart I am looking for was a chart that indicatedthe voltage of LiPo cells that should not be toped off. That is if a cell (or multiples) is at X volts, do not put it on a charger to tpo off.
Feb 28, 2007, 09:03 AM
Southern Pride
Haralson County GA. USA
Joined Oct 2004
35,074 Posts
LiPoly chargre to voltage / do not top off if above

Quote:
 That is if a cell (or multiples) is at X volts, do not put it on a charger to tpo off.
That would depend on the charger and the user.
Astro Flight 109 and other chargers can jump to the wrong cell count (higher) if you charge a mostly fully(?) charged LiPoly battery.

There is no logical reason to charge(top off) a LiPoly if the cells are at or above approx. 4.15V ea.
Note: A LiPoly cell at 4.15 is considered 95% charged. Many charger result in a full(?) charge of 4.1 - 4.17 volts per cell. There some chargers which charge to 4.2 per cell at the termination point ,however if you chaeck the voltage 20 min. later it will most likely be in the 4.15-4.17 range.

If you battery provides a 10 min. (600 sec.) flight when charged to 4.2 the 4.15 (95%) will provide approx. 9.5 min. ( 570 seconds) of flight.
AF chart

http://www.rcgroups.com/forums/attac...hmentid=470206

Charles
Last edited by everydayflyer; Feb 28, 2007 at 09:24 AM.
 Feb 28, 2007, 12:25 PM Space Coast USA Space Coast Joined Oct 2000 23,149 Posts Sounds like a chart of voltages that would prevent an autocount charger from making the wrong decision as to cell count. ie 4 cell @ 16V could be misread as a discharged 5s pack. ??