Re: TK40 photo
Different opinions about TK40.
There are advantages and disadvantages. The advantages are that you have a super bright light + a super long runtime light in the same package depending of what brightness mode you want to use.
And you can by the cells in nearly every country shop or petrol station in the world.
Many people today have some AA charger (usually included with digitalcameras) which can be used for NiMh cells. As well 2,4 or 8+ cells AA charger will work. Though a 2AA charger will be quite complicated with 4 runs, yes... :D
The drawback is just the complexity with 8 cells when one needs to change or charge. But then? In my opinion the advantage outweighs the disadvantage.
Regards, Patric