I would never buy anything from Harbor Frieght Tools.
I had a Ryobi 18v cordless set that I ran into the ground. I did
however get my money's worth out of it. When it was new I ran the
battery down out of the box, charged it up and used it until it was
dead again. This is supposed to increase the life of the battery no
matter what size. You should never let your battery overcharge or
leave it out in the sunlight. When your done working at the end of
the day unplug it. If you have trouble remembering - get a cheap
timer. 12 bucks for a timer is better than paying for two new
batteries. Also, dont use cordless for mixing anything thick like
morter. And don't use for drilling into brick unless its a cordless
hammer drill.

When my Ryobi Sh!t the bed I just took it back to Home Dump and they
gave me a replacement charger and two new batteries. I it used almost
everyday for a year before my batteries started to fail. Unfortunately
I dropped the drill off a 28ft ladder and the casing split. I decided
to upgrade to Rigid 18 volt hammerdrill combo. It has rapid charging
and you can charge two at a time. The quality is far better than any
cordless I've used and they detach a lot easier. Feel free to respond
or correct me anyone.

I have yet to use the cordless finish nailer from any manufacturer.
Has anyone had a chance to? I'd like to know the pros and cons.