Doesn't really matter. The thing is to stand in line for when the (any) shop gets a new delivery with FRESH batteries, with as long "past date" stamp on it as possible. Duracells, Energizers, it's all an even wash. Remember there was this huge thread a year ago.
HOWEVER: All active instruments are not active. I happen to belong one of those people who make a difference between active basses and active pickups. Active basses have mostly onboard EQ/Preamp switch that - if battery runs out - you can flick the switch and make your way through the song, gig, set and then swap batteries. With such brands as EMG and the like, the actual pickup runs on battery and can't be run in any sort of passive mode if the battery should be on the rocks. But on the other hand, EMG runs at smoke detector levels, (drain), so I use 2 expensive LITHIUM batteries connected in so I get not 18v but 9v for longer. 2 brand new and fresh batteries of lithium lasted almost 9 years for me, I changed them out last Februari. These will not work as long on any other bass. You have to find out what the drain are of your - whatever - active system is. EMG is in the microAmpere range, and not milliAmpere as some pedals and EQ/Preamps run at. So it can very well be a waste paying premium for lithium for anything else than EMG. BTW Lithiums, are Duracell, Energizers, Varta, whatever. These days, there mostly the same, and it's the "past date" stamp you should look for, and the shelf life. Try to get them as early as you can from the shipment from the factory. Also, not all basses will allow for space of 2 9v batteries.
