I'm looking to buy a spare Dyson battery for my V8 cordless vacuum. The current one is starting to fade after a couple of years of use, and I'd rather have a backup ready than get stuck in the middle of cleaning. I've seen a ton of options online—some original Dyson, others third-party—but I'm not sure which ones are actually reliable. I've heard mixed reviews about non-OEM batteries, especially when it comes to lifespan and safety.