How long does the battery last?
All EMG pickups and EQ systems are designed for extremely low current drain. In addition, the pickup jack included with all models has a switch that disconnects the battery when the guitar is not plugged in. To maximize battery life, you should always unplug your guitar when it's not in use.
The Specs Page includes current requirements and estimated battery life for each model. Generally, each pickup requires about 80 microamps (uA), except for the Vintage Series pickups which require 220 uA each. EQ circuit requirements vary widely but are higher than pickups.
For your reference, a standard 9 volt alkaline battery provides 580 milliAmpHours (mAh) of power. That means that it will provide 580 milliAmps for 1 hour or 1 milliamp for 580 hours. There are 1000 uA per mA. You can figure the approximate battery life of any setup by adding up the individual power requirements, then dividing 580,000 by this total. Here's an example:
1 - EMG-81 = 80 uA
2 - EMG-SV = 220 uA*2 = 440 uA
1 - EXG = 410 uA
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Total required = 930 uA
Total life = 580,000 uAh/
930 uA = 623 hours
If you left your guitar plugged in day and night, the battery should still last a month. Under normal playing conditions, you would probably be looking at changing the battery twice a year. Of course, you should treat these numbers conservatively and not try to drain every last uA out!
What happens if the battery runs out?
We were afraid you were going to ask... Because EMG pickups are designed from the ground up to operate as active pickups, they're not very functional when deprived of power. As the battery weakens over time, the output level will reduce and become more distorted. When you hear that happening, it's time to change the battery.
Below a certain voltage, the onboard active circuitry will stop working. At that point, you will hear little or no output from the guitar. Don't let this happen to you!
Other "active" systems run the output of normal high-impedance pickups into a buffer amp or active EQ circuit. If the battery goes dead in one of these systems, you can bypass the active circuit and still get some sound. That's nice, but this sort of design compromises the pickup design yielding only a few of the benefits of optimized active pickup design. That bypass switch will cost you tone and noise - a BAD tradeoff.
Da ist ein ganz normaler 9V Block drin, sei froh, dass er so lange gehalten hat. Normalerweise sollen sie laut Userberichten ca. ein halbes Jahr halten, wenn du immer das Kabel rausziehst. Ich denk mal die Ursache ist jetzt klar.
