No-one can answer your question accurately about how long a certain battery will last in a particular digital camera.
It will vary because of how much time you spend looking at the monitor, time spent downloading through the USB cable, time spent taking flash pictures, time spend fiddling with adjustments.
I would say that 178 photos is more than enough for a days shooting.
Cleaning the LCD:
There are all types of methods.
Here are some:
Cleaning the lens:
Here is what Kodak says:
Breathe on the lens and wipe with a dry soft lint-free cotton cloth.
(an old cotton T-shirt works fine).
I'm using Nikon L100. Will i be able to use the 2700maH batteries. If yes which is the best batteries for 2700maH. Also what is the number of shots i can capture. Presently i'm using the ANSMANN 2100maH batteries. I'm getting close to 178 snaps!!
Also please let me know how to maintain the camera's lens and display!!
If i use the commercial lens cleaner, will it affect the lens? or is it sufficient to use a soft cloth !!