Nokia Essential TWS E3101. Next, we have the Nokia E3101. If it looks like a stem, it’s got a 13mm dynamic driver with a 16 Ohm impedance, so it can play music. Batteries for both earbuds each have a 40mAh capacity. They can play music for up to five hours on a single charge. When you use the charging case, you can make it last for up to 20 hours longer. For added protection against dust and water, it’s also been certified as IP44, which means it’s safe.