These are fantastic, but the high voltage batteries I bought for them were a shade too short, so the light was intermittent. Now I use Eneloops - still very bright. If you want the high voltage batteries, get them from a place that allows for returns in case they don't work. I didn't see a great difference in brightness between the 3.7v and 1.2v batteries.

https://smile.amazon.com/gp/product/B016ISNU7C/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

These are the too-short batteries.
https://smile.amazon.com/gp/product/B00WJX1QUE/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

Yes, that is exactly the point I've been trying to make in my posts on this subject. When I was in grade school everything was closed Sundays. One Sunday we blew a main fuse in the house. So we called the local hardware store. The owner lived upstairs. He told us to come to the back door in the laneway and he'd sell us the fuse we need and he did. I never forgot that. Could you call a Lowes or a Home Depot in the off hours and get some help? I doubt it. We save a lot of money from their pricing but at the same time we get nothing in return as a rule. They're into mass merchandizing not into building personal relationships with their customers.

When I started in photography I went to a little store on our main street called Jerry's. It was owned and run by three guys. They knew me by name, they knew what I liked to photograph and how I tended to want quality stuff and often they also offered an aggressive price. I gave Jerry's my business for about twenty five years but alas they went out of business leaving me desperate for a new relationship. By then we had a huge camera store that was more like a corporation and it offered better pricing which is what killed Jerry's.

It took me five years to finally find another one, Vistek. This wasn't a little privately owned company but I did manage to get a good relationship again and this endured for fifteen years when my favourite sales person retired. Now I'm on the hunt for another little store but alas there are very few left now. I think that's sad.

It also makes me wonder what this is costing me. I don't know how much money I saved by having both stores advise me what I should be buying instead of what I wanted to buy. I suspect I probably saved a lot and perhaps a lot more than I've saved from the online retailers. I wonder what I am also paying taxes. As we lose the little camera stores and many other mom and pop stores we lose the relatinships and the expertise these people had which helped us grow in our passion for photography. And these people still need to be employed. How much of my taxes are going to paying unemployment insurance, welfare, retraining and many other programs to try to get these people employed in a field they were never trained for? Do we really save money buying online or do we lose money when the entire impact is considered? I don't have an answer to that question. It's also like the jobs lost to overseas. The companies save a bundle of labour costs and we get a break on the cost of our products but what does it cost to help the people who have been displaced? When we manage to get a cheap product from Korea or Japan of China, are we really getting a bargain at all? It's an interesting question that no one seems to be asking.