Whats the differents between the NP-40 and the NP-40DBA battery or are they the same?

I have a casio exilim EX-Z1000 and I'm tryin to order the correct charger (the BC-3OL) but it says the NP-40DBA battery only and my battery says NP-40...so does this mean I should'nt order this charger and if not what charger am I looking for...for those of you that have the same camera with the same battery (NP-40) what charger device do you have....I found this camera thats how I got it...but I need the correct info...so please help me out