Rechargeable 9-volts

I feel kinda dumb I had not figured this out earlier. We’ve managed to replace all the batteries in our household with rechargeable batteries, except for those 9-volt batteries. The ones with the two nipples on top that are in things like smoke alarms. But you can get rechargeable 9 volt batteries! Duh. As the current 9-volts die off, I’m swapping them out with these AmazonBasics 9-volt Rechargeables. I use this HTRC all-battery charger to charge them. — KK