Mirka Li-Ion Intelligent Battery Pack 11.1 V 2.5Ah mosmatic They have a short metal

They have a short metal tip and can take any 1/4" NPT threaded connection

You have the option of a side inlet or a top inlet if you want to mount your charger in the attic

so get this if the rest of your array has that same finish

you could undoubtedly install this thing yourself

PSB Alpha P5

Mirka Li-Ion Intelligent Battery Pack 11.1 V 2.5Ah mosmatic They have a short metalThis is a smaller battery for the Mirka 3" Cordless Angled Random Orbit Polisher. I like this battery because it doesn't have the added bulk on the end. This reduces the chance of bumping the battery on the bodywork of the car when polishing. This battery is 2. 5 Ah and is still big enough for the polisher to last a long time. I recommend picking one of these up if you are using the Mirka 3" Polisher in tighter areas and if you want to be extra