G'day,
We were given an Elli charger when we bought our car and to date it has worked swimmingly.
Our mobile signal is pants where we live so I configured it to use Wifi instead of LTE.
For information - if you have one and the leftmost green light is flashing, check that LTE has not been reactivated after the latest firmware update, it's taken me a couple of weeks to figuire out that LTE was back on, resulting in random connections to Elli and flashing green.
I disabled LTE again and all is well.