Tony Read 2 Posted July 29, 2010 Share Posted July 29, 2010 I confess to being a tad confused when it comes to the labelling of lipos. I know that a 2S pack is 7.4 volts and a 3S pack is 11.1v, but what about a 3S1P pack? Surely the 1 cell wired in parallel (which I believe this means) still gives a voltage of 11.1? Or is this a 14.8v pack? Help! Quote Link to comment Share on other sites More sharing options...
Bruce Richards Posted July 29, 2010 Share Posted July 29, 2010 3S is just a short hand for 3S1P so they are exactly the same thing. It is a bit strange to say 1P because how can one cell be in parallel with itself thats why most people just say 3S. Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted July 29, 2010 Share Posted July 29, 2010 Tony...have you read THIS Heres an extract. "Another of the great things about them is that we can happily join identical cells together in either series or parallel, or indeed a combination of the two, whereas this practice is not recommended for the older type of nickel based cells. This combining of cells in various configurations is where the pack designations come into play. If a 4-cell 2100mAh Li-Po battery is connected in Parallel to another identical battery this results in 4 cells in Series, and 2 batteries in Parallel, or, in other words 4S 2P. The nominal voltage remains the same as one battery, which in this case (4 cells @ 3.7V each) would be 14.8V. However the capacity is doubled and this newly formed 4s 2p battery now boasts 4200 mAh capacity. To increase the volts, we join in Series, to increase the capacity, we join in Parallel. Combining both increases both." There is also full explanation of S and P configurations in the July 2010 magazine. Quote Link to comment Share on other sites More sharing options...
Tony Read 2 Posted July 29, 2010 Author Share Posted July 29, 2010 Errr, so a 3S1P pack is 11.1v? It was sold to me by a trader as 14.8! Quote Link to comment Share on other sites More sharing options...
David Ashby - Moderator Posted July 29, 2010 Share Posted July 29, 2010 Should say on the label Tony? Quote Link to comment Share on other sites More sharing options...
Reno Racer Posted July 29, 2010 Share Posted July 29, 2010 I'd go back to the trader if you wanted a 4S lipo, he/she has clearly mis-sold you. Was it a reputable RC shop? Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted July 29, 2010 Share Posted July 29, 2010 Posted by Tony Read 2 on 29/07/2010 15:51:04:Errr, so a 3S1P pack is 11.1v? It was sold to me by a trader as 14.8! Yep, 3s1p is merley 3s - which is 11.1V nominal. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.