Bought this battery to rescue obsolete phone - don't want a new fancy one; I only make phone calls and few at that. It charged right up (actually I think it was already charged, because it took no time at all) and it's been working perfectly ever since. I called my son for 30 minutes and it didn't even drop down one bar on the power meter. Best investment I've made in a long time. Tempted to buy another one to save for a second same phone we still have in case I wear this one out.