Do you use any kind of protectant, like dielectric grease or Deoxit? I find applying to both the equipment and battery contacts saves a lot of headaches on my work phone, ATV, trailer lights connectors and anything else powered I use in the field.
We use some dielectric grease when we have to make some outdoor connections and it works great here in the jungle, and it also has the bonus of keeping the leaf cutter ants from slicing up your electronics too!
