Let's not forget the class factor when you take a long thoughtful draw of the pipe and then point it at someone indication that you actually know what you are talking about whether you do or not.
14250 Unprotected rechargeable lithium ion. 1/2 AA size 3.6v
AW 14250 Unprotected Rechargeable Lithium Battery
14250 Unprotected rechargeable lithium ion. 1/2 AA size 3.6v
AW 14250 Unprotected Rechargeable Lithium Battery
And i agree with Lu about the size and the way it feels on the hand etc...
But still ....duble the price just for aesthetic advantages....
I am looking at it from the"value for money" point of view...the penstyle battery might cost a couple $ more but with every battery you buy you get a brand new flow switch.