The Braille alone is $157 and as part of our September promotion we are offering free shipping.
Last I checked the amperage of the stock and Braille batteries were equivalent. When considering lightweight batteries, you should be suspicious of blanket claims made by manufacturers because they can really mess with the numbers to make their numbers look different. Braille put together this for those interested in reading it, though I believe some of the pricing is out of date:
Educational and Comparison Information
I hope this helps demystify some of the suspicious claims made by other lightweight battery manufacturers.