This is false. The current design already causes issues. Once the battery is drained in the pack, you have to unplug it and charge the pack. During that few hour charge time, the light is completely useless.
I don't think you quite followed my logic, quite possibly due to lack of clarity on my part.
I wasn't talking about the existing situation where someone only has a single cell/battery pack.
I was pointing out that selling the cell+internal connector without a battery back around it would have a particular issue in that when
either cell was being charged, the light would be useless.
For someone to be able to charge-while-using (or charge more than one cell at a time) in that scenario, they'd either need a second battery case to act as a charger, or some separate proprietary charger with appropriate connector (or a suitably built/modified third-party charger).
As History channel suggested, they could have easily put the chip inside the battery pack and built metal leads for an 18650 to be dropped in, then they could just buy 18650s and slap their name on it, like it is now. Then they make a statement, like SureFire, to not use cells other than their brand.
As I said, if they were going to sell any less-than-complete setup for use as an active spare (rather than replacement for worn cell) a holder would seem to be more logical/useful than selling a spare cell+connector, since charging and use could easily happen in parallel, as could charging multiple cells.
it is really annoying how they screw the owners over on this. They over complicated this system.
It could depend to some extent on how they got to where they are.
Their previous lithium products do seem to have been multi-cell ones, where it is maybe more understandable that proprietary packs would be attractive for reasons of cell balance, as well as things like ease of sealing for weatherproofing, having a known level of protection for cells, etc.
That seems to be the way that most high-end headlamps from other manufacturers have worked in the past.
Even going single-cell, they might be expected to stay with that approach unless there was some particular strong reason to change.
Ignoring the price for a moment, someone
could take the view that their approach is the least
complicated from a user's point of view - each cell is packaged in a waterproof (weatherproof?) housing, which can be recharged in a whole host of places, from mains or vehicle power, without the need for a dedicated lithium charger, via a cheap USB power supply (or suitable PC/netbook/TV, etc).
Cost aside, arguably a replaceable cell arrangement would only be 'better' for people who were already existing 18650 users (which group probably overlaps little with expected Nao buyers) who already had and used chargers and had a use for cells in multiple pieces of equipment.
Seems to me that the main issue for most likely buyers is the cost of the replacements, not the convenience.
I'd wonder what their market research (if any) suggested the likely breakdown of users was as far as how many spare packs people might be likely to buy is concerned?