NIMH Battery goes off after 20 shots for Nikon Coolpix L01

the camera takes just about any AA pair of batteries ... lithium will give you the most pictures .. your NiMH batteries should last longer unless they are old .. you may have one weak battery ... you can try a pair of standard alkalines to see if there is something wrong with the camera .. if those work ok then you need a new set of NiMH ... there is a new type out called "eneloop" .. they are just like normal NiMH except they dont go dead when you store them .. even after a year they are still charged .. with normal NiMH batteries as they age they will self discharge in 2 weeks or so .. so you have to charge them just before you use them ..otherwise they go dead on their own .. if you charge them then not use them for a week then you will not get nearly as many pictures ... the eneloop batteries fix that .. you can also recharge them many more times than standard NiMH batteries .. they cost about the same ..