Testing 2 Different mAh capacity LiPo Batteries connected in parallel..

I recorded a test I performed using two batteries, a Zippy 3S, 2200mAh, 20C in parallel with a No-name RCmodelpart 3S, 1500mah, 20C connected in parallel. The no-name displayed 0.1V total less than the Zippy at the start.

I used a Turnigy 35-42, 12x7 e prop, Plush 60A ESC, Precision watt meter & power analyzer, 6 cell LED battery monitors, Ar6110 & a DX7.

The tests showed that even with the no-name having smaller main leads, the 6 cell monitors showed consistent cell voltage & total voltage decrease across all 6 cells. The power meter displayed 0.2V less than the cell monitors as all of these items are NOT calibrated so are best for monitoring only.

As the power was pushed up to 200W the batteries decreased together down to about 11.2V. When the power was reduced the voltages would rise and almost equalize as per the 6 cell displays.

This proves that the paralleling of batteries provides consistent and repeatable (I performed the test before I recorded it as my camera flash card was full & I did not realize it until I was done.) power delivery.

Category:

Science & Technology

Tags:

• RC
• LiPo
• battery
• RC Battery
• battery parallel
• test
• parallel

[Raid1983]

Thx. for the experiment. So it is safe to parallel different Capacity batteries. I was looking for info on that and in some forum they said the lower capacity batt will run out of juice first and be damage. I will conduct the same experiment but will bigger disparity like a 3600mAh and a 1800mAh that I have around before try it in an real situation on my R/C airplane and later on a E-bike I am planning. Thx. again.

[dangaras1]

@Raid1983 ,

Make sure the C rating & the wiring is the same on each battery. The wires that then go to the ESC should be at least one if not two gauge sizes larger than those of the batteries.

[Raid1983]

Thx for the advice. Another person claims that the bigger capacity batt. will attempt to charge the lower capacity one causing excess heat. Did you notice that?