I have a USB charger that snaps on my Makita 18vLithium ion batteries. Just wanted to let you guys know this is available, it is very handy for charging phones etc out on the ice.
I generally swap all my batteries out to 12ah. So I just buy a $5.00 female plug and replace clamps with “Y” blades. That was I can keep a power source on the battery for other devices. Pretty much everyone already has a car adapter for their truck. I just plug mine in and good to go for days