For a regular player, you should change the battery in your active bass at least once every 6 months. This depends on the quality of the battery and how often you practice with an amp and play live. Batteries will probably last longer but 6 months is a good rule to ensure you never run out of battery on stage. But why does it even need a battery?
Close the compartment and ensure your bass is functioning correctly. It’s often recommended to use a 9-volt alkaline battery for best results and to check it every six months. Prolong the life of batteries in a bass guitar with these easy practices: Unplug your bass when it’s not in use; this stops the battery from being drained.
Only active bass guitars require batteries to power their onboard preamp. Passive basses do not need batteries as they lack electronic circuitry. Navigating the electrifying world of bass guitars brings us to a pivotal question about their power needs. The type of bass guitar you own determines if a battery becomes part of your musical kit.
By definition, a Battery Energy Storage Systems (BESS) is a type of energy storage solution, a collection of large batteries within a container, that can store and discharge electrical energy upon request.
In essence, batteries amplify and refine the electric signal within the bass itself, allowing for a more clean, controlled, and customizable output that players can fine-tune to their liking before the sound even leaves the instrument. 9v Batteries (When should I change it in an active guitar or bass?)
Depending on how long they have been sitting on the shelf, storage temp and factors like that, you might get 4 months from one and 6 from the next. Moral of the story is always have at least one extra on hand at all times. The battery will never pick a good time to die.