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Customer Review

5.0 out of 5 stars Foolproof charger with some nice features, 18 April 2014
This review is from: NOCO Genius G7200UK 12V/24V 7.2A UltraSafe Smart Battery Charger (Automotive)
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This battery charger is U.S. designed (made in China), so the packaging is covered with hyperbole: "Wicked smart features" etc., but the manufacturer has a point. The design is intended to minimize the kind of fatal error that used to fry battery chargers and batteries in the bad old days. It has reverse-polarity protection and reduces the charging current once it senses that the battery is nearly charged. Unlike my old charger, the reverse polarity protection doesn't involve replacing a fuse if you accidentally do wire the thing up the wrong way round - an orange warning LED lights up on the front panel, you just correct the error and the charger carries on as normal.

The charger will charge 12v or 24v batteries (or 2 x 12v batteries in series), and also boasts a "recovery" mode whereby it will attempt to revive sulphated batteries that have been neglected. It doesn't work in severe cases, and I haven't tried it, so can't vouch for its effectiveness in doing this.

One thing I do like is the 13.6v supply mode, which can be used to power a caravan or car in place of using its battery when mains power is available. Unfortunately you can't connect the charger in 13.6v mode to a battery, so it can't be used to prevent your car audio system losing its security code while you swap out an old battery... but the normal charging mode will do this.

The charger can cope with lead-acid batteries (open cell and maintenance-free) and also AGM ('spiral wound') and gel batteries. It will not charge NiCd, lithium ion or any other dry cell battery types.

If I had a minor gripe, it would be that the croc clips are connected to the charger via a proprietary plastic plug/socket halfway down the wires; I'm not sure of the purpose of this, and it looks like the sort of thing that would be a "special" (read "expensive") to replace if you - say - lost half of the lead in the shed. Of course, you could always chop the wire and connect it a different way, but this seems to be the only place the designers have taken their eye off the ball.

The charger comes with a printed guide that also doubles as a convenient eyesight test (i.e. it's very small!), with quite a lot of information in it. There is also an online manual, which I haven't needed to refer to yet.
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