Hip-dac v1 bad battery, what should I get to replace it?

Equipment / Electronics / Gear / Accessories Portable DAC/AMPs & Dongles
1

I have an Ifi hip dac v1 and the battery died, should I replace it with hip dac v2 or the Ifi go blu? I really liked the original hip dac especially the x bass.

Also does anyone know the replacement battery for the original hip dac. I cannot find it anywhere.

Thanks
-Jeff