I know what that is like. You buy a battery operated tool and then they come up with another, better line. So you want to use the same battery across your different tool. In most cases, the batteries will have different grooves and lines that will prevent you from even inserting the 80V battery to a 40V tool. In any case, you shouldn’t use 80V battery in a 40V tool. Here’s why.
Why You Shouldn’t Interchange Different Voltage Batteries
Electricity is not something to be taken lightly. Some people think that if it is batteries and not “live” electricity, that it could cause any harm. But this is wrong.
Every device that uses electricity, whether it is using a battery or another power source, was designed to keep very specific conditions. Violating those can conditions can harm the battery or the electrical parts inside the device.
So when you provide a tool with more voltage than it was design to keep, you risk destroying the tool or your battery.
In addition, as said earlier, you can even see in the picture at the top of the page that the batteries have completely different structure. They will just not fit in your tool and will not fit in your charger.
When I bought my Greenwork 80V mower, I knew I was making commitment to the 80V line. So far I am fine with it. I know it won’t last forever, but my hope it will for a few years.
Kevin Brighton is a father of 2 boys ages 9 and 3. Other than being a handy townhouse homeowner, he also takes care of rental properties for investors (a lot of quick fixes, rarely serious construction). Every tool reviewed in this website was manually tested.