NEC — Ten No Koe 2
The Ten No Koe 2 was harbouring what are probably the original Hudson Soft branded batteries, in there since the day it left the factory. No damage done, but they were long dead.
Taking on the mammoth task of recapping a Ten No Koe 2 (😂) I came across an interesting archeological find. It had what are probably the original batteries in it. They are Hudson Soft branded. Although there didn't appear to be leakage on the device, the batteries are dead.
