The replacement battery for my LG env vx9900 works very well. I'd forgotten how things used to be back when the phone (and original battery) were new. I'm back to having a charge last more than 6-8 hours. So far, the charge has lasted about 24 hours and counting!Shipping was very fast, as well.This is a review written in the early stages so it should be taken with a heaping spoonful of salt. I love the newly-rediscovered freedom of being able to not have to charge up my phone so frequently.