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Old 12-24-2014, 06:07 AM   #1
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question about amps in parallel and series


Ok just a little noobie question.

Q1. If I have say 2 batteries both having a max continues draw of 30amps and both are 4.2v. If I put them in parallel would the amps be 60 continues at 4.2v or would it stay the same 30 amps at 4.2v?

Q2. If I did it in series would it be 30amps at 8.4v or 60amps at 8.4v?

Thanks for the help in advance.
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Old 12-24-2014, 06:37 AM   #2
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Parallel would double the amperage but not the voltage.

Series will double the voltage but not the amperage.
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Old 12-24-2014, 01:50 PM   #3
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I believe that the 4.2 volts you quoted is the fully charged voltage, not the nominal voltage. If your battery is what I think it is (LiMn), the nominal voltage is 3.7 volts.

The 30 amps continuous is the maximum safe discharge rate for the battery. If you exceed that, it would damage the battery.

Your actual discharge rate is based on the device used. While putting 2 in parallel will increase the safe rate, if you are powering the same device that you did with one battery, it will not increase the actual discharge rate, it just doubles the run time. It is not going to "supercharge" the device.
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Old 12-28-2014, 12:56 AM   #4
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Thanks guys just doing some double checking
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