I have tried the manual winder and seen how slow they move? A battery drill would be the only way to wind it in a reasonable amount of time.
I agree at least with Stennah, the German one, having in the end removed it, there was no brake release, so remove mills pin at top, and push chair and rack out of the rail is only way without power. I lucky had a pair of spare 7 Ah batteries fully charged and had to swap batteries to get chair where stairs could be used again.
It was so silly, the power was from a 13 amp socket, and the chair lift had simply been unplugged, but will only charge when parked either end, so once moved plugging back in did not help.
The Stennah at mothers was just as bad in a way, again only three points where it was charged, if used daily no problem, but if not the batteries were over charged, so one would move it a few foot down, then it stopped due to low battery, no warning lamp battery low, just stopped. There was also a 180° bend, so could not see bottom from top, and there was a leg which when down blocked the hall, which needed to be put down first before chair would move, I tested with a stout cardboard box, it crushed the box. Loads of safeties on the chair, non on the arm which had to be lowered before the chair could be used. And the lower controls for the leg where on the door side of the hall, so mother in a wheel chair could not leave the house if the leg was down. Back door had a step so she could not leave that way. When my dad forgot to lift leg I had to leave house through back door and re-enter through front door to access controls to lift leg.
Installation done by order of county council social services by Stennah, so much for heath and safety in the home.