High C vs High mAh

|MIDNCOCO
High C vs High mAh

I watch Trent’s (Guy from “MyGeekShow) video I did some calculations in using the new Sony and Panasonic Batteries for my quad applications.  I was looking into using this either in my Hubsan H107C or my Blade Qx.  Both are setup with a HD camera.  Assuming a linear throttle I calculated estimate battery life based on a 5A total load and add the LiPo’s in Parellel to show comparable weight.  In most cases the NCR18650B had double the capacity then the others.  The higher C rating will give you more of dynamic response due to the excess AMPs above the required of 5A.   The NCR18650B being about 1A excess in reserve will feel less dynamic or more like having a stock battery.   For my calculations I figured the best configuration to try this out would be that of my Blade QX using my 808#16 camera.  Although it is slight more weight than my modius with a stock battery, predict although it may feel  sluggish in the air I will be able to significantly increase my flight time.  I will post the video of the results in the second part.

    AMP C Rating Cap mAh weight/cell Voltage/Cell
             
Hubsan stock 6 20 380 11 3.7
Hobbyking Nanotech 13.5 45 300 9 3.7
Panasonic NCR18650B 6 1.764706 3400 45 3.7
Eflite stock 7.5 25 500 14.5

3.7

              Flight time at full C
Series Parellel mAh V AMP Weight  
               
1 4 1520 3.7 24 44   3.8
1 5 1500 3.7 67.5 45   1.333333
1 1 3400 3.7 6 45   34
1 3 1500 3.7 22.5 43.5   4
Discharge at 5A assueming linear throttle
100% 80% 50%
     
18.24 22.8 36.48
18 22.5 36
40.8 51 81.6
18 22.5

36

    Camera Battery   Total Weight Sub for NCR18650
H107C 808 # 16 17 11   28   17
Blade QX Mobius 38 14.5   52.5   -7.5

I also look into using this for my mid-size  450 quad and small FPV planes.  I also did this calculation and against 2200 and 3300 mAh size LiPo’s comparing a combination of series and parallel connections to achieve the required minimum AMPs.  I found that the delightful consequence in doing this to achieve a greater AMPs out was significantly increasing the capacity resulting a greater flight times. 

To give you a background on these batteries, they came from the E-smoker community.  Those clowns you see in the mall puffing electric cigarettes and blowing out water vapor.  Apparently for their applications they need a lot of energy and capacity to do this for people who normal smoke multiply times a day.   Early e-smokers were changing their batteries out 3 times a day.  Even with these higher capacity ones they still do it daily.  In order to fit the product all those batteries are 65mm X 16mm diameter cylinders about 45grams.  The batteries on the market sacrifice capacity for AMPs.  For example there are 6A @ 3400 mAh, 10A @ 2400mAh, and 30A @ 1600 mAh.  Before everyone goes out and buys the 30A battery my calculations show that with the reduced capacity to achieve the higher AMPs it would not give you the best flight time.

    AMP C Rating Cap mAh weight/cell Voltage/Cell
Panasonic NCR18650B 6 1.764706 3400 45 3.7
Panasonic CGR18650CH 10 4.444444 2250 46 3.7
Sony US18650VTC3 30 18.75 1600 45 3.7
             
Hobbyking turingy 44 20 2200 77 3.7
Hobbyking turingy 66 20 3300 111.6667 3.7
             
Hobbyking Nanotech 77 35 2200 66.33333 3.7
Hobbyking Nanotech 148.5 45 3300 105.6667

3.7

series Parellel mAh V AMP Weight   Time
3 4 13600 11.1 24 540   34
3 2 4500 11.1 20 276   13.5
3 1 1600 11.1 30 135   3.2
               
3 1 2200 11.1 44 231   3
3 1 3300 11.1 66 335   3
               
3 1 2200 11.1 77 199   1.714286
3 1 3300 11.1 148.5 317   1.333333
20A Time    
100% 80% 50%
40.8 51 81.6
13.5 16.875 27
4.8 6 9.6
     
6.6 8.25 13.2
9.9 12.375 19.8
     
6.6 8.25 13.2
9.9 12.375 19.8

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