RING 12A Car Battery Charger for Vehicles Up to 3.0L: Compatible for Lead Acid & Gel Batteries

This charger is the basic model from Ring but that has not detractged from the usual quality you get from this company. Follow the instructions for connection sequence. This is important for safety reasons and avoiding large sparks. I used it initially to bring a dead battery back to life that was inadvertently discharged by leaving the key in the ignition of my Astra. Took overnight to fully charge the battery. I now top up every weekend and it only takes 20 minutes or so to show the full charge green LED This may take longer in winter when the car uses more electricity for lights heated, windscreens etc . There is a fail safe indicator to ensure correct polarity has been connected. The Astra battery is in the boot almost under the seat and is not easily accessible. Vauxhall have provided a positive connection point under a flip-up cover on top of the fuse box in the engine compartment with the negative connection being an obvious protruding stud in the bulkhead near the fuse box. I use slow charge for top ups and the fast charge for a major dischrge correction. I use a multimeter to check the level of charge before and after charging. A full charge is usually around 14 volts for the 12 volt cicrcuit. A very handy built-in pocket at each side of the charger to store mains lead and battery connectors is a neat touch. The first time I used it the charger got quite hot so I kept an eye on it but during subsequent charges it barely gets warm. I have no hesitation in recommending this piece of kit.

To charge my car battery.

This charger works well my second one , I broke first one so bought it again

My Mercedes battery was totally flat after weeks standing idle. I attached the terminals and switched on at the mains. Initially I selected the fast charge option and the charger indicated that the battery was fully charged. Obviously not true as I couldn’t even open the car door without the mechanical key.So I thought it was faulty. But then I turned it off, selected the slow charge option, and then switched it back on. Then it indicated via the ‘charging indicator’ that the battery was charging so I hoped for the best.It took around 2-3 days to charge. But to work out the charge time, take the Ah rating of your battery (95 Ah in my case) and divide by the Amps charging rate shown on the charger which averaged around 2 Amps per hour. Hence an estimate of 47.5 hours to charge which turned out to be about right. Eventually, the battery was fully charged and I’ve had no problems since. Now I charge it up every weekend as the car remains idle most of the time.Easy to use item but would be better if you didn’t have to select slow or fast charge as I almost returned it. Apart from that I’m very happy with my purchase as it did the job and saved me the cost of a new battery.

A very good well designed battery charger - British made. I have a Honda Jazz Hybrid car which has a stop start function at traffic lights and cross roads. Coupled with this I use the car infrequently and for relatively short trips. Consequently I have to charge the battery very often.