The Boulder W2 Battery is the powerhouse behind the Boulder W2 Concentrate Pen. Although it serves as a replacement part, this battery is also fully compatible with 510 threaded oil distillate cartridges too, making it one of the most highly desired hybrid alternative devices on the market.
900mAh High-Drain Grade A Battery
3.3V to 4.2V Working Voltage
High Quality Matte Black Finish