Adjust flying load according to your wishes. The table displays calculations based on the information given. Move the sliders according to your setup. Please use a special build LiPo battery charger and NO OTHER! Overcharging can cause your LiPo to catch fire and burn your belongings to Kingdom Come. So, a 4000mAh LiPo can be charged at a maximum rate of 4000mAh / 1000 = 4A. If not, keep in mind a maximum charge rate of 1C. ![]() Most LiPo vendors will tell you what the maximum charge rate of the battery is. And you won't like your multicopter falling down from the sky suddenly either. They don't like to get discharged to the bottom. This will warn you when the battery is drained before it's fully empty (20%). Preferably, always use a LiPo low battery warner on your RC device. Please notice that current draw depends on your way of flying and external factors such as resistance, weight and wind. So that's why the combination capacity/discharge rate is of such importance for selecting the right LiPo for you project.Ī constant current draw of 20A from a 2200mAh LiPo will get you:( 2200mAh /1000) / 20A = 0.11 x 60 = 6.6 minutes flying time. So, a 2200mAh / 40C LiPo can only handle an Ampère draw of 88A at max. The amount of cells only determine the voltage (V) of your LiPo, as needed for your equipment.Ī 3S 2200maH 40C LiPo pack will get you this:Ģ200mAh x 40C = 88.000 mAh discharge rateĨ8.000 mAh / 1000 = 88 Ampere constant discharge rate. It's important to know that the battery cells don't count up for maximum current draw. The combination of capacity and discharge rate is what you will need. This fact is very important to keep in mind, when choosing a LiPo battery. Most quadcopters use LiPo (Lithium Polymer) batteries. The battery capacity, together with the LiPo battery's discharge rate will define its maximum current output (Ampère, A). A battery with a 1000mAh capacity can deliver 1 Ampere (1000mA/1000) for 1 hour. So you can get pretty close to 20 grams with only the bare minimum but much more flexibility if you had a drone with a bit more lift. The battery's capacity is defined in mAh. If the run-times calculations done by the guy in the first link is correct and you can get 6 hours out of a 2000mAh battery then 150mAh could give 25-30 minutes. For more on that, I suggest to read the manual or ask your supplier. Not all brands say something about the peak discharge rate on the battery itself. It's advisable to stay on or below nominal discharge level to preserve battery future life. Table 4 lists a variety of batteries with different capacities and their corresponding flight times at full and half discharge rates. Since there are a total of 4 motors, the total maximum drain of the battery will be 40 amps. This means that 25C is the nominal discharge rate and 40C is the maximum burst discharge rate. The Turnigy 2730 Brushless Motor has a maximum amp rating of 10 amps. Most batteries cases say something like "25C to 40C" discharge rate. A 4S LiPo would therefore supply 14.8V.Īpart from the cells, a discharge rate is defined by the letter 'C'. A LiPo battery consists of multipe cells.
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