Review on 🔋 Sealed Lead Acid Battery Charger - D1724 by Craig Edwards

When I bought this item I was afraid it might be too good to be true. Unfortunately, tests have confirmed this fear. This unit should not be sold as a battery charger as it is not intended for use as a battery charger - it is a simple non-adjustable alligator clip wall power supply. I received a charger identical to the one shown in the photo. It is designated Model 41A0163 with a specified output of 6V/12V and 500mA (switch selectable voltage). Since there is no other information, I tested it to determine the actual output voltage. I have found that in the 12V position this wall power supply outputs an unregulated and unfiltered full wave rectified voltage of 12.3V RMS and 17.4V peak. When measuring the output voltage with a digital multimeter, measure the mean value. from a full wave rectified voltage at 11.5V. But that's just the average of the waveform with a peak of 17.4V. If you connect a small capacitor to the output, measure the peak voltage. This product is not actually a battery charger but is incorrectly marketed as such. Instead, it's an inferior wall power adapter with alligator clips attached. It provides enough current to charge a small battery of several Ah in a few hours, with the risk of overcharging and permanent damage. It doesn't have enough power to charge large batteries in a reasonable amount of time, but it can charge for several days. Those using it with large batteries are unlikely to do much harm to their battery as large batteries take a long time to recharge at the low current this charger puts out. But if you leave it plugged in indefinitely, you're likely to damage even the largest of batteries. When you use this "charger" with smaller batteries, they quickly begin to hiss and bubble - something you don't want from sealed lead-acid batteries. , yeah When you charge a low capacity battery with this charger, it may appear that the battery is properly charged, but when you subsequently measure the capacity or battery life, you will find that they are severely affected. so-called "floating") chargers or chargers with mode switching. Constant voltage chargers provide a constant voltage limited to 13.5-13.8V. A lower voltage will not fully charge a lead-acid battery, and a much higher voltage will damage it. about 14.7V), but switch to a float voltage of 13.5-13.8V for final charge and subsequent recharging. While it is normal to apply more than 14V to the battery during the initial stage of high-current charging, providing more than 14V for a long time will lead to positive electrode corrosion and water electrolysis. This charger ends up delivering up to 17.4V peak, which is way too much. When using this "charger" for small sealed lead-acid batteries and the battery voltage rises above 14V, you can hear it start hissing if you put your ear to the battery. This is the sound of a damaged battery. If you keep a close eye on battery voltage while charging, and understand battery charging dynamics enough to know when to stop, you should be able to use it safely. Fix this charger by combining it with an output voltage regulator (you can find some LM2596 buck regulators here at Revain) that you set to output a fixed 13.7V. Conclusion: As a charger, if you think the product is too good to be true, you're right. For use as a 12V wall power supply it is expensive, unregulated and unfiltered. In any case, the value for money is very bad. For battery specifications and useful information on how to charge properly, go to the power-sonic dot com website.