It's a SkyWalker X-33 Solar Impulse Edition.
It went back for the battery change, only to return with the jumping second hand EOL indication.
Luckily, I noticed before it warmed up & returned it - within days of return.
This is now the shopping list of things they need to rectify AFTER they'd serviced it & returned to me.
beggars belief - but it is all zero (additional) cost to me !
z