Tuesday, October 17, 2017
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Tattu 4s lipo battery test

tattu-lipo-4s-1550mah-45c-battery-testing

Why does many people choose Tattu 4s lipo battery? Why does Tattu 4s lipo battery called Professional racing batteries? From this test, we will get the reason.Today we are testing Tattu battery. This test we are using the Tattu 4s 45C 1550mAh lipo battery.

Tattu 4S 45C 1550mAh LiPo

This is a very heavy battery, probably due to the extra capacity and length of the discharging lead.

tattu-lipo-4s-1550mah-45c-battery-testing

Tattu batteries have a very wide distribution, and the high availability makes Tattu one of the most used LiPo brand out there.

  • Price: $31
  • Weight: 178g
  • Size: 72 x 36.5 x 33.0mm

Result and Comparison

The test was carried out in this simple course, simulating what it’s like in a real race.

There are 2 parts of the course that requires 100% throttle to show the discharging performance of the LiPo, and the voltage and current are recorded (red stars).

Right after these full throttle punch outs, there is a long slower pace cruise at 40% throttle, data is also recorded at the end of this straight line to see how well the battery voltage recovers.

C Rating and Voltage Sag

One of the most important aspects when choosing LiPo battery, is to look at what the maximum discharge current is. If you discharge more current than the LiPo can handle, you will start to get voltage sag (big drop in voltage level).

C rating is supposed to indicate the maximum discharge current:

maximum discharge current = C-rating * battery Capacity

However not every battery manufacturer/marketer tells the truth, it’s not uncommon that C rating is over-stated.

From the spec of the Tattu batteries we are testing:

  • Tattu: 1550mAh * 45C = 69.75A

My quadcopter draws about 70A to 75A of current at full throttle, and from this calculation, I would expect to see the Tattu battery to have the least voltage sag.

On the other hand, Tattu and Drone Lab performed similarly better in the test.

Power of Batteries

Another useful chart to look at is the power. If the LiPo can provide more power at each punch out consistently, your quad can reactive more quickly and out-race other quads. It’s a key factor to win a tight race :

Tattu’s output power is very consistent through out the race in all 4 laps. However, the Dinogy didn’t do that well right from the beginning, and the power it provides also seemed to diminish toward the end.

power-of-batteries

Time Charts

I also plotted some more graphs of this test. The data is plotted every 5 seconds during the flights. Hopefully these charts can give you a better understanding of these batteries performance.

Time Charts

Time Charts

 

The interesting thing is that these batteries had close flight time (if I land when they reached their specified capacity). But note that when the Tattu and Drone Lab used up their specified capacity (1550mAh and 1500mAh), their votlages are still well above 14V, which means you can probably fly a bit longer (I normally land at 13.5V). Maybe they are slightly larger packs than specified by the package?

Conclusion

This is only a simple test, and the samples I tested doesn’t represent all the batteries of that brand and model. But anyway, from the data above I think I would stick with the Drone Lab and Tattu.

It costs just as much as the Tattu, but gives you less flight time and less power. Size and weight is not a huge difference. So most people choose Tattu 4s lipo battery.

 

 

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