I went out to the storage area to try to install a TV behind the doors in the bedroom of our Bullet 247BHSWE. Sadly that didn't work out (TV is about .3 inches too thick at 1.9 inches with a .6 inch m...
Battery tenders are not designed to 'charge' batteries. Their purpose is to zero out the battery's normal self-discharging and any minor parasitic draws. Even that can overwhelm the BT if too many things are drawing current.