How much does this cost to the nearest dollar?

Gomadic Portable AA Battery Pack Designed for The Garmin Nuvi 650 - Powered by 4 X AA Batteries to Provide Emergency Charge. Built Using TipExchange Technology
There are always times when our Garmin Nuvi 650 seems to run out of power at the most inopportune times. Without a conventional charging source in sight, we are often left with no recourse other than to let the battery run out. Enter the Gomadic Portable Emergency AA Battery Charger for the Garmin Nuvi 650. Simply insert a fresh set of batteries into the battery pack, toggle the on/off switch and connect your Garmin Nuvi 650. Instantly the device will start to charge and you will be up and running again. Backed by our Gomadic Lifetime Warranty and over 10 years

Price is $21.00
Price: $21.41