The manufacturer doesn't specify how long the battery on this video baby monitor lasts, but reviewers say you can get around six hours of continuous use from it. (thespruce.com)
That's how efficacy is proven in clinical trials with continuous use of the diffuser (24 hours a day) allowing the cat to constantly perceive the reassuring messages. (feliway.com)
The set was just about in continuous use through all those years as it was strong and useful. (gratefulprayerthankfulheart.com)