Hey All,

I just got my new isdt charger today.  I decided to do an internal resistance test on all my lipos.  I should mention that I use and abuse all my packs equally and some are older than others.  

The 2 power hungry quads that use these batteries are equipped with tmotor f40 pro 2600kv and emax 2306 2400kv.  Needless to say, all these packs sag when I punch the throttle.  I have a guestimation of how many cycles have been put on each pack.  All the packs being tested were charged for about 5 minutes.  A photo is taken after 100 mah is added to the pack.

Here's some info I found on RC Groups about internal resistance:

"Based on my online research, combined with my own experience and findings, I would say, as a general rule, a per cell rating of between 0-6 mΩ is as good as it gets. Between 7 and 12 mΩ is reasonable. 12 to 20 mΩ is where you start to see the signs of aging on a battery, and beyond 20mΩ per cell, you'll want to start thinking about retiring the battery pack."



























To summarize the results,  my favourite packs to fly are infinity & adrenaline.  Both Infinity and Adrenaline packs have plenty of punch, the cells stay balanced and they are light.  I would say CNHL and BlackLabel performs about the same, both are good for the price you pay.  Dinogy Graphene packs deliver the most noticeable steady power, but they are also quite heavy.  It also looks like one of the 2 Dinogy packs that I got have a bad cell.  The one rotorev graphene is almost on it's way out, It performed well when it was new.  The multistar 1000mah lipo has the least amount of IR but has a bad cell and it's barely been used.

What I learned from all this is that paying more money does not equate to higher quality lipos.  One of the best performing lipos I've ever used are infinity graphenes. The only issue with the infinity graphene is that it came with "ST60" connectors which melted during flight!!  I had to change them to xt60.  

On the 1300mah packs, I can barely get 1 1/2 mins of flight time.  I would recommend getting 1500mah packs for anyone planning to run new generation high power motors such as emax 2306, tmotor f40pro, BH R4 etc.