I want to do work my water pump with a relay connected Arduino. On the side of the water pump. Need I a battery 12 V. What battery can I choose?
Depends on how much current the pump requires and how long you want to run it before recharging or replacing the battery, can you post a link to the pump?
Hi,
Batteries are rated in Ampere-Hours.
How many amperes does you pump draw?
How many hours to you need to run it before recharging the battery?
That defines the ampere-hour battery rating you need.
terryking228:
That defines the ampere-hour battery rating you need.
Iff the battery can provide the current required, though.
(Battery's continuous current in mA = battery's capacity in mAh x its "C" rating")