What is the current drain on a battery?

Given a fully charged battery with a voltage of 4.2V and a coil resistance of 0.5 Ohms, the current drain on the battery is 8.4 Amps. This is calculated using the formula: I=V/R. I=4.2/0.5, therefore I=8.4A. The wattage produced is 35.28W, calculated using the formula: P=I 2 xR. P=8.4×8.4×0.5, therefore P=35.28W.

What does C-rate mean in a battery?

C-rate is used to scale the charge and discharge current of a battery. For a given capacity, C-rate is a measure that indicate at what current a battery is charged and discharged to reach its defined capacity.

What happens if you discharge a battery in one hour?

Generally, for a given capacity you will have less energy if you discharge in one hour than if you discharge in 20 hours, reversely you will store less energy in a battery with a current charge of 100 A during 1 h than with a current charge of 10 A during 10 h. This phenomenon is significant for Lead batteries, much less for lithium batteries.

How to calculate the voltage of a battery in a series?

Even if there is various technologies of batteries the principle of calculation of power, capacity, current and charge and disharge time (according to C-rate) is the same for any kind of battery like lithium, LiPo, Nimh or Lead accumulators. To get the voltage of batteries in series you have to sum the voltage of each cell in the serie.

How many watts a battery can be discharged in one hour?

2 batteries of 1000 mAh,1.5 V in series will have a global voltage of 3V and a current of 1000 mA if they are discharged in one hour. Capacity in Ampere-hour of the system will be 1000 mAh (in a 3 V system). In Wh it will give 3V*1A = 3 Wh

How to get current in output of multiple batteries in parallel?

To get the current in output of several batteries in parallel you have to sum the current of each branch . Caution : do not confuse Ah and A, Ampere (A) is the unit for current, Ampere-hour (Ah) is a unit of energy or capacity, like Wh (Watt-hour) or kWh or joules.