So, i am about to buy a brushless motor a ESC and a 18650 batteries for my arduino.

The batteries "specs" is 3.7v and 20a, if i would to put 2 and more in parallel would i get 7.4v 20a or 7.4v 40a?


closed as off-topic by gre_gor, VE7JRO, sempaiscuba, SDsolar, per1234 May 19 '18 at 5:09

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "This question does not appear to be about Arduino, within the scope defined in the help center." – gre_gor, VE7JRO, sempaiscuba, SDsolar, per1234
If this question can be reworded to fit the rules in the help center, please edit the question.

  • 2
    This has nothing to do with Arduino. – gre_gor May 18 '18 at 15:55
  • where would i then post it? – Bit May 18 '18 at 15:56
  • The electronics stackexchange. Also what is that battery specification? 3.7V is the loaded battery voltage, but 20A? Maximum continuously deliverable current? – Maximilian Gerhardt May 18 '18 at 17:11

In parallel you'd get 3.7V 40A

What I think you mean is in series. That way you get 7.4V 20A.


Series connection of battery adds voltage not current but parallel connection keeps the voltage same. Current may be increased with some condition. One things should be remembered 20 a current is huge it is not required by arduino. May be for some welding device it needs that current which can be controlled by high current mosfet

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