Sulfate builds up damages the battery lifespan and performance over time. Ring battery charger fixes this through the process of desulfurization. Ring battery charger protects your car from being affected by extreme weather conditions. Starting is even guaranteed on cold mornings and winter periods when the Ring charger battery is left charging overnight. When the ring battery in your car is not working because of the sulfate build on your battery plates, which is counterproductive to the battery’s lifespan and the overall battery performance. How to fix the sulfate build-up battery? Some chargers will not completely operate if the battery level is down or the battery charger has not been in use for a long time.

The control element is a programmable shunt regulator IC1 (TL431) containing an internal precision 2.5 volt reference which is compared with the potential applied to its ‘adjust’ terminal. IC1 is normally OFF, but as the voltage across the charging battery rises, the voltage applied to IC1’s ‘adjust’ terminal from the potential divider R16- R4- VR1 rises proportionally. As soon as the DC potential, smoothed by E2, exceeds 2.5 volts at this point, the TL431 rapidly changes from non- conducting to conducting. This turns Q3 OFF which turns Q2 OFF, removing the positive drive from power MOSFETs M1 and M2 and cutting off the charge current. At the same time, IC1’s cathode grounds the base of Q5, turning Q5 ON and applying a positive potential to pins 3 and 6 of IC2. This drives amplifier B OFF and simultaneously drives amplifier A ON, extinguishing the orange “charging” LED and lighting the green “fully charged” LED. Amplifier A turns Q6 ON, Q4 also turns on and, via R15 (220k), raises the positive potential applied to the ‘adjust’ terminal of IC1 to around 2.7 volts, latching it firmly into the ON state. IC1 remains latched on, and further charging is inhibited, until the latch is reset by switching off the mains supply and disconnecting the 12 volt battery.

Together with Dr Phil Cadman G4JCP, they analysed the operation of the circuit to try to establish how the automatic charge control works. The following is their brief summary.

The ring rcb320 battery charger is a high quality 12v, 20a metal case battery charger. Fully automatic with fast and slow charge rate settings. It's easy to read ammeter and charging/charged LEDS enable you to monitor your charge. Includes 80a engine start function.

Orders

Maintaining that the battery stays for a long time without overcharging. Ring charger recharges the batteries when the car is at an optimum position while repairing the damaged battery additionally protecting the car’s battery from overcharging. FREE UK delivery applies to Zone A, UK Mainland England, Wales and Southern Scotland (Central Belt of Scotland) and Excludes surcharge post codes and areas. The RCB320 Charger protects from overcharging by automatically switching to a lower voltage when it detects that the battery is full. This keeps it topped up and prevents damage caused by overcharging, such as the battery being unable to hold charge. Express delivery option to offshore, highlands and remote postcodes may take longer than the usual one working day. The surcharge may not apply to small items being sent via Royal mail or MyHermes etc... Where possible we will try our best to avoid courier service for surcharge areas.