The epithelium is the corneaâs outermost layer. Its primary functions are to: 1  block the passage into the eye of foreign material, such as dust, water, and bacteriaÍ¾ and.  provide a smooth surface to absorb oxygen and nutrients from tears, which are then distributed to the other layers of the cornea.
On average a camera battery will charge in 1-6 hours, depending on the battery and the charge it will hold.Sometimes, it can depend on where you are charging it also. For more info, refer to your owners manual for your camera, or your battery if it was purchased seperately. if you have 6 batteries in a 36 volt system, and you use a 20 amp charger it could   take up to 5 1/2 hours (depending on â¦ the state of charge of your batteries when   you begin the charge).
Some of the newer batteries will recharge in 1 to 3 hours, while some of the less expensive ones may â¦ take 8 to 12 hours. Both are available from retail outlets at a nominal cost. also the charger must have the capability to charge the 1-3 hours ones if those are the ones you are using.n average a camera battery will charge in 1-6 hours, depending on the battery and the charge it will hold.