DO NOT MISPLACE YOUR ORIGINAL PURCHASE RECEIPT. I purchased the Hart H80RM01 in July 2022 from Walmart.com and have been very happy with it until 1 of the batteries died. I contacted customer service to obtain a replacement, but they have just blown me off. I registered my mower and batteries with Hart but because I cannot provide a copy of my sales receipt, they won't help me at all. Apparently, I provided a copy of my receipt to Hart as part of the registration process, but for "privacy" reasons they can't access it. Also, they will not accept my credit card statement as an alternate proof of purchase. Basically, they just don't want to provide good customer service. I purchased the mower from Walmart.com, I was redirected to them from the Hart website. Unfortunately, I completed the purchase as a guest so Walmart cannot provide me with a copy of the receipt because the purchase wasn't made through an established account. It's hard to believe but a new battery costs $1,477.45, and they are unavailable so I cannot use the mower. The virtually identical Ryobi battery is a fraction of the cost and widely available but, by design, they are not interchangeable. Not sure where I'm going to go from here but good luck with your mower and hold onto that receipt!!!