Regarding the battery issue try this.
On you calendar 1 year from today put a task to replace battery paks in your presses.
At that time, not now, go to a Batteries Plus or similar service provider and have them rebuild the battery pak according to spec.
Now that you have a spare this will work and your batteries should always be fresh.
REMEMBER never shut the poser off when the battery is not attached.
My 2 cents