RCU Forums - View Single Post - Resistance difference in battery cells
View Single Post
Old 03-13-2017, 10:13 AM
  #4  
opjose
 
opjose's Avatar
 
Join Date: Nov 2005
Location: Poolesville, MD
Posts: 12,624
Likes: 0
Received 0 Likes on 0 Posts
Default

The lower the cell resistance the better.

Lower resistance equates to better sustained output and less heat build up.

I am seeing 2-3 ohms per cell on newer high output Graphene 45C batteries.

On my older well used LiPo's I'll see up to 20 ohms. The packs that are in the best shape are in the teens.

Once they get beyond 30+ ohms, I find that the batteries do not produce more than 75% of their rated capacity and I consider chucking the packs.

You want all of the cells in a pack to be as close as possible to the others. The OP's post indicating 4 ohms and 100 ohms indicates one good cell and one fairly bad one.