Has anyone upgraded or replaced their Dyson V15 Battery?

[emmabrown]

I've been using my Dyson V15 for a while, and I'm curious about the battery situation. My original Dyson V15 Battery seems to drain faster than it used to—on boost mode, it's almost dead in 10-15 minutes.

• Has anyone here replaced their Dyson V15 Battery yet?
• Did the replacement restore full runtime, or was it just slightly better?
• What brand or supplier did you use (e.g. Aussie Battery, USA Batteries, Dyson original)?
• Any tips to extend the life of the battery (charging habits, storage, avoid deep discharge)?