The sleek and subtle O.pen O.riginal Battery features a super compact stylus design and autodraw heating. Compatible with any 510-threaded cartridges, the O.pen O.riginal lets you explore an abundance of options on the go. The breath-activated heating system delivers a consistent eight-second puff, known as the Perfect Puff. You can charge up via the included 510-threaded USB charging attachment.
These are THE BEST pens Ever!!!
Overall very easy experience. No problem with ordering / receiving / using the battery. Will certainly purchase again.