As you have used the term Battery I assume you are not in North America.
Here in North America
The price of a dozen Grade A large eggs here is around $2.50 in grocery stores.
The price of a dozen Large free range eggs is about $1.00 more or $3.00
These prices vary depending on where you are located and where you buy the eggs.
Farm fresh eggs bought right off the farm are often within the same price range as from local grocery stores but much fresher.
The yolk of a free range egg is normally darker orange in color. Much more tastier than a poor caged bird. If you buy from a local farmer then they will be able to tell you how their chickens are kept. Eggs from the supermarket come from commercially raised chickens. The USDA has no regulations on what constitutes are free range egg. Therefore a non-free range chicken can have free range eggs. And a commercially raised free range chicken is usually not free range.
It would be 1.59 for six eggs. So a total of 9 dollars for three dozen.
The egg as such probably isn't much different. But the chicken that laid the free range egg has probably led a happier, more natural Life than a battery chicken.
The USDA has no rules on what can be called a free range eggs. Therefore a chicken that lays eggs in a house where they cant go outside, are crowded, have no clean air, the ground is dirty and littered with dead chickens and feces, and they are forced to live in 24/7 artificial light that helps boost egg production is considered as free range as the eggs lain by the family farm raised chicken that gets to roam in a pasture and eat bugs during the day. Buying from your local farmer ensures true free range eggs. True free range chickens get a greater variety of food and they eat what the like, not what is supplied. Free range hens get fresh veggies and proteins from bugs and insects. A free range egg is always much fresher when bought from the farmer as they are collected daily and not transported for miles to be stored in refrigerated containers or the back of a grocery store for days and weeks. If you get a chance, fry up one store bought egg and one free range farm egg in the same pan. Taste one, then the other and the difference is amazing. Also notice the difference between the yolk colours, the free range egg will almost always be brighter and more appealing
free range chickens are free to run around outside, and have lots of space and grass to be as natural as possible battery chickens are kept in barns of thousands, and can hardly move because of the other animals. they are unhealthy and lots die due to the poor conditions. free range is normally more expensive to buy, but is better for the chickens
i dont care and i dont know and probably its something like 200000000000
yes, if it hasn't suffered damage on the outside much.
Certainly. As long as you get them from a reliable source that sells you fresh eggs, not old eggs, free range eggs are great, and much healthier than store-bought eggs. If the hens are fed camelina seed, the eggs will even have Omega fatty acids in them, which will add an even more appealing touch for customers. It doesn't make any difference if the eggs are fertilized, although you may want to talk to your customers about that, if they are squeamish about it, and assure them that fresh, fertilized eggs do NOT have chicks growing in them, and taste exactly the same.
In my area (western Canada) thay can be bought from farms for $3 or 3.50. In stores they are a little more, but not nearly so fresh.
$1-$100
If by best you mean number of eggs, then the hybrid bird Black Rock is generally regarded as the best free-range layer - it's much of a muchness though.
That all depends on the size of the battery. Most batteries sold in supermarkets range from 1.5 to 9 volts.