Many modern flashlights contain 3.6V lithium batteries. Of course, you also need the appropriate chargers for this. One of them is the Nitecore UI1 model. This means that batteries of all common sizes can be charged. This makes it versatile and suitable for most flashlights. It has only one slot and is powered via Micro-USB. This enables an extremely small design and a weight of only approx. 40g, which makes the charger perfect for travel. In contrast to other models, it is loaded with up to 800mA. This enables a shorter loading time.
Conclusion: If you are looking for a small, light and uncomplicated charger, the UI1 from Nitecore is just right for you.