High-performance, pre-wired, and competitively-priced 9 V battery straps, designed to connect most 9 V alkaline and lithium-ion batteries are available from Keystone Electronics.
The premium high-performance design is made of molded polyethylene or rigid fiber, which incorporates high-quality insulators and phosphor bronze or spring-steel, nickel-plated, snap-on connectors. Available in "T" or "I" configurations, Keystone's straps are designed for greater dependability, and use soldered-in red and black wire leads in lengths of 4", 6" (6.5" for fiber-covered version), and 8". Shielded types which offer full insulation to reduce accidental short circuits are also offered.
Keystone also offers a cost-saving, economy group which features a similar design and is available in "T" or "I" configurations. Fully insulated, these have brass, nickel-plated contacts with a molded ABS or a vinyl-covered base. Wire lengths available are 4", 6", or 8".