It seems like a tower of babel when it comes to figuring out which lithium ion battery is best for astrophotography at a remote observing site.
I see a crazy number of different types listed at the Battery University.
But basically, it seems like there are four that I've heard of ...
- Lithium Ion - but many batteries don't specify exactly which kind they are.
- Lithium Ion Polymer (LiPo)
- Nickel-Manganese-Cobalt (NMC)
- Lithium-Iron-Phosphate (LiFePO4 or LFP)
So the question is, which is the best for our astrophotography needs?
- Which can be discharged the most without damage?
- Which maintains a 12v output the longest before the voltage drops?
- Which is best for cold temperatures?
- Which can be used in high-humidity environments?
- Which ones are most likely to explode?
The NMC type seems to be used in the car starter powerbanks, so it must be something about it being able to deliver high current initially?
I've read that some drop below 12 volts almost immediately?
Assuming cost is no problem, is the LiFePO4 our best choice currently? What are it's strong points for our application? What are its weak points?
For our use, is it better to get a high-tech battery with all of the over/under current shutoffs, or just a simple battery with positive and negative terminals?
Edited by Jerry Lodriguss, 20 July 2019 - 04:37 PM.