No. They are charging about double for a battery vs what a battery should cost. And you don't even now what brand it really is. All cigarette shape e-cigs are made by a handful of Chinese companies. Some are good models and some are not. Then rebranders take some model, put their own name on it, charge more, and sometimes even cripple the carts in some way to make them hard for the user to refill so they'll have to buy everything from them.
I searched on Google - safecig is an RN4081 so if you want that model just buy an RN4081 at probably 1/2 the cost
http://www.e-cigarette-forum.com/forum/rn-4081-super-mini/123660-safe-cig-rn4081-2.html
But I recommend you watch/read the following in the Sticky threads of New Members section here
1. Newbie videos
2. The thread with Library in its title - read the multipart guide. Most of the models it shows are popular (except the Blu which the author shows for sentimental reasons - many people end up replacing 1/2 of that with parts from another model)
If you are interested in a cartomizer model, also consider KR808D-1 instead which is sold just slightly higher as the Vapor King at Vapor4Life in many interesting colors. And be aware that automatic batteries can sometimes turn on by themselves from wind or vibration so many people recommend manual batteries which also give you a bit more control over your drag.