Great! I've been looking for a battery maintainer for a while. Very similar products from optimate or battery tender are stupidly expensive, even second hand. This little thing does exactly the same job for twenty quid. I spent far too long trawling the web for a charger, and I'm glad I found this one in the end.
This isn't a powerful charger that will "revive" fully discharged batteries or jump start a car, that's not what it's for. It's designed to gently maintain your motorcycle battery when the bike is sat in the garage.
Connect the fused cable directly to your battery and hide the connector somewhere discrete. (I have cable tied it to the frame with the cable coming out from under the seat so I don't even have to remove the seat, letalone the tank to charge as I did previously) Then, everytime you park up, just connect the cable from the charger to the cable on the bike. It will keep your battery charged and in good condition ready for the next time you take it out. You can leave it connected indefinitely. It also comes with crocodile clips so you can connect it to batteries that are out on your bench.
I'm sick of leaving my bike in the garage for a few months or weeks, only to find my battery is dead, won't start and needs a £70+ replacement (because in reality, once a battery is fully discharged, it will never reliably hold a charge again)
The charger has no buttons and no settings to worry about, just two LEDS - one to tell you it has mains power, and another that is OFF when not connected to a battery, RED when charging and GREEN when maintaining.
Great little product, does exactly what it's supposed to, great price. Solid construction, decent cables and connectors, easy to use. A must have item for anyone with a motorcycle in the garage.