what type of batterys or we should says "cells"
Nickel-cadmium for example gives 1.2 volts per cell



Jim P wrote in message
...
I have a voice recorder that uses 2 AAA batteries.
I only get about 8 hours of recording out of the 2 batteries and I would
like to attach a power supply
by soldering it to the battery terminals. How many volts can I apply to the
device without frying the circuits?

The configuration of the batteries are as follows

Top of device

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