Fender American Elite Precision Bass Owners Manual - Page 21

2. CHANGE BATTERIES Fender® offers basses with passive electronics (no batteries) and basses with active (battery-powered) preamps. Depending on the instrument, your active bass may have either a 9-volt (one-battery) system, or an 18-volt (two-battery) system. Visit the Knowledge Base in the Support section of www.fender.com, where the service diagrams link presents detailed information on more than 250 Fender instrument models. unwanted noise that indicate that the batteries must be changed (note that active basses without an active/passive switch will not operate in passive mode when the batteries are dead). For basses with two-battery 18-volt preamps, always replace both batteries at the same time, as mismatched voltages may adversely affect the performance of the preamp. It is a good idea to use the same brand of battery consistently. Typical battery life for both systems is approximately 600 hours of playing time. All Fender basses with active preamps are equipped with switching jacks that engage the battery when a cable is plugged into the jack. To maximize battery life, unplug your cable from the bass when not playing the instrument. As batteries lose power, the voltage supplied to the preamp will drop, resulting in distortion and 21