
Yes, but you don't have to keep buying them, do you? :) 7dayshop.com does some good value chargers and batteries.
Don't use normal alkaline batteries, they won't last ny time at all. Use "oxy-alkalines"/"Oxyride"/etc or lithium (1.5V type only!!) for far, far better single use performance. Again, these are MUCH cheaper mail order than in the high street.
If you camera will accept them, CRV3 batteries are quite neat. They last ages and are lighter, and each one replaces two AA cells. However, many cameras don't take them any more, which is a shame :( You need to have two oval slots rather than four round holes for them to work. (and the right polarity arrangement) Again, much much cheaper mail order.