The unit works independanty so if one battery needs more attention it gets what it needs even if the other is in good shape

Nice unit works flalessly keeps all four batteries fresh if there is a issue it lets you know right away

The unit is nicely compact and takes up less space and one less 110V outlet in my garage

I also own a solid one charge system - that has a 10 year warranty, because the manufacturer knows these are crap - it is cheaper and much better to buy two individual solid state units.

I use this to charge two ATV's in one garage, and a car/jetski in the other garage...really great little units.

This is the third Battery Tender I've purchesed and it a great unit, as expected.

Great unit

I like the single unit but I can say that this system never seemed to charge two batteries at a time from the moment I bought it

If you contact them for service you might as well buy another unit as the repairs are extremely expensive

Hopefully this unit will not lose zones as some other reviewers have noted

This unit is easy to use and even easier to set up

This unit took care of the boat and the summer car and they work great as long as you buy the available entension lines so you can get them all out of your way and into the corners of the garage where you won't trip over everything.

The unit worked right out of the box as expected

Great unit.

The unit itself is very robust, it has abit of weight to it and feels very robust

This unit--like the other Battery Tender charges--is much 'smarter' than a cheap trickle charger or than a regular battery charger from a few years ago.

The unit keeps the batteris healthy and ready when the bug bites for a ride

I gave it an overall 3 stars for the defective unit and poor customer communications.

A very sturdy unit, well made

This unit works

This dual unit is used off the electric grid (solar only) and it works great!Highly recommend this product

The unit does not stop working, and keeps both my truck and Mustang charged

So far this unit has worked flawlessly

This unit is quite versatile.

Very nice mountable unit for charging two batteries.

The other charger was a singe output, higher quality unit with much more power, and best of all it had a desulphating pulse mode which far exceeded this units ability to revive batteries

My first unit I purchased about 15 years ago and it still works great and has been in constant use the hole time

I really like this unit.

Good unit

Nice unit should do just fine for what need charging

(Yellow LED)Unit housing is black plastic and has feet that could be used to mount unit to a wall or table for permanent fixed useComes with all the accessory cables you should need for useBox and packing is well made for safe damage free shipmentCONPower cable from main unit to AC plug

I really like having one unit instead of four separate chargers to plug in

This is a great little unit.

Great unit.

I am still giving this product 5 stars because I am convinced I probably have a faulty unit

Nice unit

This is a great unit

The unit works flawlessly and gives you a good indicator of what is going on

This is a spectacular unit

This unit is vented to disperse the heat while connected and shuts down when the batteries are fully charged

Great little unit..comes with all the adapters you need for your two bikes...

It is a great unit, arrived quickly and was immediately put into service

That unit worked great so when it was time to buy a charger for our boat and jetski batteries, we bought the dual unit.

I feel like this unit has more than paid for itself versus the cost of replacement batteries

I've used this unit on the batteries in my motor home for the past three months and love it!

Excellent unit

NICE UNIT TO KEEP MULTIPLE VEHICLES, BIKES, TRACTORS ETC CHARGED.

The unit is working well, 4 batteries are presently being charged and the unit is doing fine

Now, that aside, the unit is excellent

The unit works and its reliable in subzero temperatures.

Works as expected, great unit for maintaining the batteries of my four collector cars while they are napping during the winter

But aside from this issue, great unit.

This unit is perfect for use on a motorhome.

Spend a little extra and purchase these tender/charger units over the competition.

Awesome unit

(it only works for one battery, but I can get it local for $26.99 from Autozone).To recap, it seemed like a solid product, I just rec'd a defective unit.