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Batteries in Parallel Formula

In a parallel battery connection, the total voltage remains the same as the voltage of each individual battery, but the total capacity (measured in ampere-hours, Ah) is the sum of the capacities of all the batteries. The specific formulas are as follows:

Total Voltage (V_total)

V_total = { V_1 = V_2 = … = V_n }
where { V_1, V_2, …, V_n } are the voltages of each parallel-connected battery.

Total Capacity (C_total)

C_total = { C_1 + C_2 + … + C_n }
where { C_1, C_2, …, C_n } are the capacities of each parallel-connected battery.

Total Current (I_total)

I_total = { I_1 + I_2 + … + I_n }
where { I_1, I_2, …, I_n } are the currents that each parallel-connected battery can provide.
For example, if you have three batteries, each with a voltage of 1.5V and capacities of 2000mAh, 2500mAh, and 3000mAh respectively, then:
 
The total voltage ( V_total ) remains 1.5V.
The total capacity ( C_total ) is 2000mAh + 2500mAh + 3000mAh = 7500mAh.
 
This type of connection increases the system’s total capacity, thereby extending the device’s runtime while keeping the voltage constant.
  • Multi-Cell, Parallel Formula, Parallel-Connected Battery, Solar Battery, Wholesale Guide

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