Yeah they just needed a recharge. They're like NiCad batteries.

If you consider the source material, you'll get your answer.
"Oh nothey sent the wrong Spock!"

He was seen fighting alongside Cowboy's ground forces. However, once he had launched that long spear he would (at best) have only been armed with melee weapons, so was most likely gunned down.
"I'm not really me. Thats me there- that pile of albino mouse droppings!"

I always wondered this myself. Same as Quopeg the tattooed guy off Caymen's ship. I imagine he perished along with Caymen on the ship but you never saw him so maybe he's still there on Akir somewhere..