Installed a 2500mAh Lipo battery pack into my GT.
This is removable but also can be charged when cover removed.
I swap one then charge the other.
I also installed a Gammatronix programmable led battery indicator
Battery pack and charger purchased
Mating cable for battery
First removed all AA battery parts and plastic posts in the battery compartment.
The cover also needs reducing as the battery pack is just too thick with these bits in.
Battery indicator installed at the bottom of case
Battery indicator and GT power wired to Battery cable and hot glued in place.
The indicator preforms better if connected direct to the battery thick wire rather than
the thin wires of the GT.
Battery pack installed
Cover closed