thats what I done .... see my previous post on this thread .... with shipping, I paid £17 and it is blindingly bright. I only use it on the low setting. If the battery pack stopps working, I will buy another complete light with the battery pack for another £17
I use this in conjuction with my cygolite hotshot back light and a high viz jacket for night time riding
Yup, it's cheaper to buy a new generic light with a battery pack than a new non generic battery for lights that have replaceable batteries.