Batteries are connected in series to add voltage, while ampere-hour remains same. For example, if two 6V (Volt) with 10AH (Ampere-Hour) batteries are joined in series, it will produce 12 Volt power and still have the capacity of 10AH. The most common applications of series wired batteries are consumer electronics such as Fire alarm, of 9V battery, in which six batteries of 1.5V are connected in series to produce 9V. Such connections of batteries in series for a single application is known as battery bank.
To wire batteries in series, the negative terminal of the first battery is connected with the positive terminal of the second battery by using jumper wire. Now connect your application to open positive and negative terminal using another set of cables.
Precautions:
1. Polarity of batteries needs to be observed carefully and only then wiring should be done, as per above stated circuit.
2. Never wire the remaining positive and negative terminal of the batteries with each other, as it will short circuit the batteries and can cause damage.
3. Chemistry of the batteries used in a series connection should always be similar, whether it is lead -acid or lithium -ion, to avoid explosion and injury.
4. The voltage and capacity of the batteries that are in connection should be same, otherwise it will lead to charging problems and shortened life of batteries.
5. Use high duty cables for wiring to avoid short circuit and explosion.
6. Check the requirement of your appliances before connecting a battery bank, as high power or capacity can damage your appliances.
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