I bit the bullet and installed a lithium battery ten days ago...
(Figured I could make this announcement as I saw a similar post on the main board.)

From Batteries Plus, this battery replaced the 6.5 year old Duracell AGM. Was gonna use the same battery, but this lithium came in at only $10 more than the AGM. 36 Month full replacement warranty and no core charge. (Brought the old battery in anyway for proper disposal.)
So far, so good. The Valk seemed to fire before I pushed the start button. Time will tell on it's longevity. The Lithium weighs less than a quarter of the old AGM. Almost feels like an empty plastic box when you pick it up!
Anybody else make the fateful dive into the Lithium realm? Hildr the Valkyrie has all LED lighting and now a Lithium Battery...
it's a new beginning for this 25 year old Valkyrie! 