Camera - a fragile thing, prone to all sorts of harmful influences. If you want it served was ist kobalt for a long time then pay attention to the mechanical structure. If the shell metal, then at least not crack if dropped. There are models designed to operate in extreme conditions. Traditionally Pentax pays great attention to protect their equipment from the adverse effects of the environment.
Power cords - Again, in my opinion, they are poor quality and might damage your electronics. Duct tape sand paper painter's tape lithium facts and bungee cords are good though.
The lithium-ion battery is light years ahead of the earlier batteries and considerably better than the Nickel-cadmium (Ni-Cd) or the nickel-metal hydride (Ni-MH) batteries which are still being used. These batteries are less expensive but the Li-ion batteries are far superior in three ways.
Remember how the old batteries would start to wind down before they quit totally? Well, the new Li-ion batteries don't do that. They have the same power when drilling the last screw as they did when drilling the first screw. That seemed amazing to me but I found lithium bettery stock it to be true.
In terms of charging these powerful cells, when specifically used in an LED flashlight, special chargers are available all over the internet. Most will handle a 18650 battery as well as a variety of other Li-ion sizes.
The thing to realize about any battery is it does have a measurable lifespan and efforts to extend it will help but not stop the eventual demise. So the number one thing that you can do to extend the life of any of the newer lithium batteries is always take it out if you are running on DC power to lessen the heat impact. Whenever buying any replacement battery, always check the manufacture date and try to find the newest one available.