They can be recharged more than 1000 times and are charged via a Micro USB port or USB-C

they can be stacked

USB-C PD Port

woodland or even MilSim

Ultrair Rød Gas, 570 ml Levering af Våben & Ammunition They can be recharged moreUltrair Red Gas is a high quality airsoft gas that is specifically designed to maintain the efficiency and precision of airsoft guns. With a capacity of 570 ml, this gas provides enough energy to power your airsoft guns for a long time. The gas here is a red gas that has an expected 175 PSI pressure, which makes it good especially in the winter or if you want a little more kick in your weapons when shooting blow back (be aware that some weapons cannot