Digilife DDV-7300 Camcorder - Battery will not...

Question

I bought a DDV Digilife Camcorder from a bay area-based company at Oracle Open World in San Fran last year. I don't recall the name of the supplier.
Almost immediately I had problems with the battery holding a charge. It will now only take about 5 pix before cutting out. Also the off-button won't work when the battery is charged so it discharges all its power very quickly.

As I don't have the name of the supplier to return it, I'd be grateful for advice on how I can get it repaired/fixed.

Many thanks. Sara