Pretty much what it says in the title, i dont usually see people powering their ESC BLDC using anything lower than 7.2 volts, and I dont see why i must using NiMh or LiPo
Thank you.
Hello @Mahr758 and welcome to the community
The voltage required is related to the KV of the motor and the rpm you want it to reach … for example
if you have a motor with 1000kv and you want the rpm to reach 7400 rpm you will have to use 7.4v battery the relation is
RPM = KV x Voltage
This video will answer all your questions
1 Like
Hi @Ebram, yeah I saw that video but the thing is, i connected 4 AA NiMH batteries (4 x 1.2 = 4.8 V) to the ESC that was connected to the motor but the ESC didnt even start up. So I was wondering if there was some minimum voltage
Thank you
Hey @Mahr758
Of course there is a minimal voltage for every motor.
Can you provide us with the motor model ?
1 Like
Yes @Ebram, of course. Im using an Emax Brushless Outrunner XA2212/1400KV. On the bottom it says “2-3s LiPo” if that means anything. Also will alkaline AA cells work instead of NiMH or LiPo?
Thank you.
Hey @Mahr758,
A (LiPo) cell has a nominal voltage of 3.7V. For the 7.4V battery above, that means that there are two cells in series (which means the voltage gets added together). This is sometimes why you will hear people talk about a (2S) battery pack - it means that there are 2 cells in Series.
So in this case the motor can operates with 7.4v (2S) or 11.1v (3S).
As for the alkaline AA cells, you can connect 7 batteries and see if it’ll work or not.
Also you can check the specifications in this link
Hopefully this answered your questions, feel free to ask again if you have more questions 
Sincerely,
1 Like
Or just 7 since 7 x 1.2 = 8.4v which is enough.
1 Like
Glad to help, best of luck
1 Like