Anchor Barracuda pi voltage question

[1KBlueTuber]

Just got a new to me used Barracuda. Original nicads are long gone and have been replaced with an 8 AA rechargeables holder with a 9 volt connector. I've been told this detector was designed to run on 8 volts and presently runs around 12 volts. My question is if this is safe to do or do I risk frying the unit? Should I try to run a 6 AA holder at 9 volts roughly. I tried it out as it is last Sunday and it performed well. Thanks in advance for your help.HH

 

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[SoCalDesertFox]

12V should be just fine. The ICs typically utilized in newer digital detectors (most electronics, actually) usually operate from 5-12V (which is why your 7.2V "9V rechargeable" works in most 9V devices.) The transistors alone typically can handle upwards of 40-60V.