Review on ⚡ Efficient 6V 12V Battery Charger: 1.5A Auto Maintainer for Car, Motorcycle, Lawn Mower, Boat, Snowmobile by Mike Rubenstein

I bought 2 and both showed a full charge but the batteries didn't charge. My MIL was used on a generator that didn't have a charge for the hurricane (I thought it might be a coincidence) then I may have messed up the battery on the RV I was using as a mechanic. I only found out after using the battery on an off-road bike where it indicated a fully charged one. I spent a day troubleshooting electric start, only finding out with a multimeter that the battery was bad. I am very disappointed in this product. I don't write many reviews but this product has cost me a lot of time and money.