The batteries are loaded .. it's a detail but especially considering they have been in solar energy! it is always good for the planet. The advantage of rechargeable batteries is more to do: economic, ecological, practical (no need to ask whether we still have available batteries or thinking about throwing them in the bins provided for). The huge advantage of these batteries is that they have been studied so as not to suffer long periods of inactivity. It remains to be seen but announce that the issue has been studied is already a good thing because the majority of current batteries can be damaged if we leave them too long empty. Otherwise nothing to say ... I tested with a lamp in continuous and intensity remained essentially the same from beginning to end.
