Quote:
Originally Posted by BT55
Many guitars use the end pin to switch the battery. Shorts in the end pin or leaving a cord connected will drain the battery. I’ve spoken to a few gigging guitarists and they use rechargeable 9 volt batteries so they know that they have full power for each performance.
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^ This! I use high-capacity NiMH rechargable 9vs in my 3 acoustics with preamps. If I ever wonder about their current capacity, I throw them on a charger during the day and they’re good to go!