I've just been down to the boat and the power had been left on so the house battery is completely dead; the voltage thingy was showing 0.0 volts. The RSC612/RESC612 also has maintenance mode - ideal for long term connection - and memory saver function, so it can retain the vehicle's electronics settings (e.g. radio settings) if the battery is disconnected. The winter charge mode is ideal for charging in cold weather. The LCD screen makes it easy to take readings and select charge or analysis settings. This is a comprehensive battery care tool.

This is a feature loaded charger at a sensible price. The 12A output will deal with the largest of car and van batteries, however in the real world, you will likely want one of the lower settings like 4A to give your battery an easier time. A total of four charging options and four test options will help you keep your battery in tip top condition. A clear display gives a running commentary on the voltage and current going into the battery at any one time. Suitable to use on lead, gel, calcium, AGM and EFB batteries (including those with START/STOP technology) the Ring 12A Smart Charger analyses voltage status, alternator recharging performance and battery start power performance, with results are shown on the LCD screen. Meet your all-in-one battery care companion – the RSC612 Smart Charger. This versatile solution enables you to charge, protect, repair, and analyse your 12V vehicle batteries effortlessly. With a large easy-to-read digital display, it offers a unique insight into the health of your vehicle’s charging system. Took the house battery home to put it on charge. I stopped off at Halfords and bought a Ring Smartcharger+12 on the way - I thought " ... my 35 year old battery charger mught not be up to reviving a completely dead battery and the Ring has had a good press on the forum so ..."BAD POINTS: Nothing major really; When selecting the CCA, it would be good to hold the button down and let the number automatically ramp up. Going from the default 300CCA to 950CCA means pushing the up button 65 times. The manual is brief, some examples would be helpful. Read full review I started the engine on the other (engine) battery and ran it for an hour. The voltage thingy now showing 0.1 volts. Gave that up. Smart Battery Charger, to charge, protect, repair and analyse 12V batteries in vehicles up to 5L. Smart chargers are ideal for lead acid, gel, calcium, AGM and EFB batteries - and essential for maintaining START/STOP vehicles. As a bonus, the unit can be clipped to the battery terminals and supply power to the vehicle while you take the battery off to change it - this is called the memory saver feature. This keeps power on the vehicle and can prevent problems with the alarm, radio codes and other headaches when the battery power is removed. Clearly, it needs to be plugged into the mains to provide the power...

We've been hard at work looking for our favourite battery chargers, examining them on performance, price, versatility and usability. Car battery chargers are on hand to recharge and, in some cases, recondition your battery, and we have the best examples for 2023. The best battery chargers shortlist:

The best battery chargers shortlist:

Ring's range of inspection lighting and professional battery tools are designed to give exceptional performance in tough workshop conditions. Auto electricals designed specifically for 24V commercial applications. Ring's range includes vehicle lighting, camera systems and in-vehicle power.

From tyre inflators to battery care, Ring's range of car accessories helps motorists to get the best out of their cars and enjoy better, safer driving. Ring's comprehensive range of vehicle lighting provides exceptional illumination for 12V, 24V and specialist vehicles. However, short mains and charge leads, a high price, non-IP65 construction, and no separate reconditioning mode all cost it points.Test modes comprise two static tests which show the % charge and CCA respectively, however the latter involves selecting the CCA (or EN) of your battery which can be a pain, see bad points below. A couple of live tests complete the picture, one to measure the low water mark when the starter is turned which is a great real world test for the cranking capability of the battery. Finally, an alternator test which will show if the alternator is OK or if further attention is required. Provided the battery hasn't been drained to the point of damage, you can recharge it with a mains-powered charger. This is often the most traditional technology you'll find, fundamentally unchanged for decades, so there are cheap, robust options. For the small amount extra it costs to get a more sophisticated charger with a boost function, there's little reason to skimp here. Chances are, if you've got a battery flat enough to need charging, you'll benefit from the jump-start, too. Battery booster I'm having a serious sense of humour failure. It's been one of those "Why me? What else can go wrong days". Also, SWMBO was hoping for a sail today so I'm typing this in the doghouse. Equipped with four battery diagnostic tools, the RSC612 offers unparalleled insights into your battery's status. From start power and alternator performance to battery cranking and voltage levels, you'll gain a comprehensive understanding of your vehicle' health without costly trips to the garage.