My Lumi battery seems to be playing up.
It won’t allow more than one lamp to turn on at any one time (leads not an issue).

Once the lamp is on it will stay on however.

Anyone had this and how did you sort it? And was it expensive?

Give Lumi a phone, they are very helpful and have great customer service. If you are lucky they might even fix it free.

Sounds as if it’s unable to supply enough current for both, maybe a duff cell, maybe the pack’s just shot. They do have a finite lifespan, and lose their capacity over time.

“maybe a duff cell, maybe the pack’s just shot. They do have a finite lifespan, and lose their capacity over time. “
If that is the case if the other cells are in good order Lumi will rebuild the battery for you.
give them a ring, they are always very helpfull