I am just wondering whether anyone has had to replace or buy a spare battery for the G-Force tuning system which featured on many of the 2015 range of Gibson guitars? I am aware that these batteries are supposedly available in the $US20 apiece category, but where from? Non of the dealers here in Canada that I have checked with actually carry them, not even Long and McQuade. I have been told by them that they can be ordered and shipped, but now the price jumps by 400% or more. This is odd. I have even contacted the European maker of the battery. Same story. They will ship me a battery which is about the same size as a regular 9v battery, and is advertised at around $20, for close to $90 inc shipping. Any thoughts on where I might find such a battery and at a price closer to the stated retail price. Thanks everyone.