Conveniently transport an extra battery for your Focus Portable Concentrator as backup when you travel in the durably-made Focus Battery Case. Constructed from long-wearing black nylon, it’s lightweight yet rugged enough to withstand use by frequent travelers. The case is secured shut with a Velcro flap and safely stores your battery until needed. The case conveniently comes with a belt bucket attachment and measures 4" wide x 1" long x 3" high, giving you enough space to hold one extra battery. Gain peace of mind knowing you have an extended power source readily available when you need it in the compact, easy to transport battery case that’s fits Focus portable oxygen concentrators.