This is great, it' s a pity that somehow they didn' t solve it so that it could be charged through an ordinary charger for ni-mh cells, but I guess it probably won' t be that simple, they would have to put the inverter from 1.5V to 4.2V again and it would charge it would be a week. Especially if you have 4 or more pieces in series and you need to charge them at once via the micro USB connectors, so it' s a minor complication, but I have a USB power supply from the ham with 8x USB, so it doesn' t bother me at home, I mainly want it for a wireless mouse, so I probably won' t mess with it anyway outside.
These flashlights may have less capacity on paper than Ni-MH cells, but really only on paper, in fact the 1600 mAh is better because the inverter keeps the voltage constant at 1.53V and thanks to that the device does not switch off prematurely because the “weak battery“ like that It is a classic rechargeable pencil that has a great capacity on paper, but in practice it is a problem to use it due to a drop in voltage. Everyone knows that, you put an almost new ni-mh flashlight in the camera, charges the flash, and due to a short-term voltage drop, the camera turns off because the battery is low, so it really won' t happen to you.
I don' t know how these cells are with a current that can realistically or short-term can really give it, the manufacturer states 1.6A, which should be enough in the vast majority of devices. Just for testing, I tried to put it in an old camera and flash a few times, and there was no problem with that.
However, the disadvantage of this solution of a li-ion cell with a 1.5V converter is clear - the device cannot correctly show the state of the battery, so it is necessary to take this into account. I would also expect some minor self-discharge, because it has a protection and charging circuit and it always has some slight consumption permanently, but they are lithium batteries, so you can fart it on the charger at any time and not solve any formatting as with conventional charging cells, which has always been terrible. poisoning, one person charges it to 1.48V one day and only 1.3V the next day. I don' t understand why similarly designed lithium batteries with a 1.5V converter didn' t start to be used before, now it' s a little late because the time of “pencils“ has passed a bit, but it will still find use.