To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
I ordered and got 5 new Arlo batteries, charged them up over night and they only lasted 1 day, worse than the ones I replaced. To make it worse there isn't anywhere on the site to find out if anything can be done about it.