FLIW W0Y6W Replacement Battery Compatible with Dell XPS 15 XPS 15-L521X Series,Compatible P/N:WOY6W 9F233 3NPC0 [11.1V 65Wh]

Just purchased this battery in 9/2019. Battery is not reliable. After placing my Dell laptop into sleep mode and coming back a few hours later, the battery has completely discharged. This has happened half a dozen times already. When charging the battery (reading of zero percent after total discharge), the battery only takes an hour to get to 100 percent from zero. I'm very close to putting my old dell battery back in since this battery operates so poorly. Stay away.