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The Mercury Smart Lead Acid Battery Charger is a compact, lightweight maintainer designed for 2V, 6V, and 12V lead acid batteries including SLA, AGM, Gel, and VRLA types. Featuring built-in overcurrent and reverse polarity protection, it ensures safe, hassle-free charging with intuitive LED indicators. Equipped with crocodile clips and a 1.8m fly lead, it’s perfect for motorcycles, cars, ride-on toys, and more, supporting UK AC 100-240V power for reliable year-round battery maintenance.
Manufacturer | Mercury |
Part Number | 690.004 |
Product Dimensions | 8.2 x 5.6 x 8 cm; 125 g |
Item model number | 690.004 |
Colour | Gray |
Material | ABS |
Item Package Quantity | 1 |
Display style | no display |
Batteries included? | No |
Batteries Required? | No |
Battery Cell Type | Lead Acid |
Item Weight | 125 g |
G**Y
In it for the long term
With a maximum output of around 600mA, this charger is perfect for extended use. Many years ago, I laid a car up for 5 years, & to keep the battery & engine in good condition I would start the car once per week. I would leave the lights on (with the engine off) for about 20-30 minutes to help discharge the battery, then attach a 500mA trickle-charger to gently build the charge up again. When I started to use this car, the battery lasted a further 9 years without any problem.I bought this very similar charger to repeat the process during this Lockdown period & I am repeating the method described above. Of course, these days we have to consider that modern cars have sophisticated electronics that sometimes are still working when the car isn't being used, so therefore I think this makes it more important to keep the battery in top condition.This charger works very well: it doesn't get hot, and it delivers a nice, gentle charge. I have mine on a timer, which I have set to give around 8 hours charge per day. The only minor grumble is that the leads could be just a little bit longer, maybe by another metre or so, but otherwise this is an excellent unit and very good value for money.
N**E
Perfect for charging 12v Kids Ride On cars/quads/bikes
The media could not be loaded. Having lost the charger for my grandsons 12v electric car, I did a lot of searching for a replacement charger but was surprised at how expensive they were.So I decided to order this charger, now you can use it straight out of the box by switching the switch on the front o 12v and then removing the seat cover on your kids ride on, which is where the battery is normally stored and clipping the connectors from the charger to the positive and negative terminals of the battery.The charger has a useful indicator which is green when charging and turns off when the battery is charged.I replaced the clip on connectors on the charger with a 5.5mm x 2.1mm male connector (which are very cheap) so I could plug directly into the charging socket of the ride-on car. Obviously only do this is you are happy changing the connector but it makes life a lot easier.The 600ma charge rate, takes a few hours to charge the car but does a good job.Overall I can thoroughly recommend this charger and was so impressed I bought a second for a kids 12v ride on trike.
A**E
It's was good for the job...
My husband wanted this one it done the job wot it was for
M**Y
It works! And at a good price too!
Does what it should, quickly and effectively.
F**H
First class
First class
**N
Good product
Very pleased thank you
P**.
Poor QC
Plug seems well made, but the front of the plug is upside down to the plug side, this means when plugged in to the wall 240v AC socket the writing, switch and LEDs are upside down. I checked the voltage and polarity these appear ok although upside down. There could have been a Negative & Positive polarity issue and a loud bang!!No instructions are supplied. For the price of this unit a simple instruction leaflet could have been included.Would I purchase again? NO. Had the above not been YES. Poor QC. Left plugged in charging 12v battery, Time will tell.
S**.
very happy with product
Very happy with product would buy again
Trustpilot
4 days ago
3 weeks ago