There are plenty of other more robust battery holders out there in the market place, but this genuine product is the same construction as the main battery holder but a little longer to accommate a battery that is 305 mm long. Fits like a glove.
Works and keeps 2nd battery installation looking factory.
Genuine Toyota kit, which just fits and works and keeps everything looking factory. Although I think it is over priced for what it is... (plastic tray and battery clamps with retaining plastic clip.
It does allow fitting of a N70T battery.