Battery for I.S.I VideoTherm model 2000 Camera

We got a couple of older VideoTherm 2000 cameras made by I.S.I. The company doesn’t seem to exist any more. Does anyone know what battery it uses? I believe it is one of those popular videotape camera batteries.

The camera has 320x240 pixel focal plane sensors of the BST type, with spectral range 8-14um. It is a bit big but still quite capable to this day.

Thank you.

Take the unit down to Batteries Plus (or a similar store) and let them figure it out. Maybe they can rebuild the battery packs once they examine it.