I'm really beginning to notice my lack of electronics background..
I'm building a low power beehive monitor using Arduino pro mini 3.3v. everything is powered from li-ion battery at 3.7 - 4.2v
sim800L module likes its voltage between 3.7 and 4.2v and takes about 2 amps peak.
To reduce the power consumption I would like to be able to cut the power to the sim800L module.
I have been reading up on transistors but I'm quite lost as I don't understand what I'm reading in the datasheets of different types of transistors.
I was trying my luck with a TIP120, but that seems to give me a voltage drop of 0,7v = 3,5v, causing the sim800L to go into undervoltage protection.
I see people talking about p-channel mosfets, but I think I might face the same issue there.
Can somebody help me out, or point me in the right direction?