I bought this 2GB compact flash card from aptiva as a back up card. I am a photographer and have lots of cf cards but this card drains my battery with in a few photos. I was shooting the band Seether the night before at the House of Blues and ran out of memory on my 1 camera so I put this Ativa card in went through 3 fully charged batteries in 2 songs. When I say batteries I am not talking AA or AAA but 7.2 volt Lithium Ion batteries. I shot 2 bands before for over 300 photos and did not go through 1 battery. Would anyone know the problem I know its not a high speed card but I use it as a 5th card never usually need it but when I do need it, It always fails me. Has anyone else encountered this problem?