No reason to get snippy, your posts don't really make much sense and you seem hesitant to answer questions from folks trying to give assistance.
Around 3.7v isn't fully charged and you never mentioned what you're using to check battery voltage.
Are you sure your charger is functioning correctly?
What brand of charger is it?
Have you cleaned the battery contact areas lately?
Have you tried a different set of batteries?
Will it fire a delivery device even though the battery indicator reads 0%?