LVYUAN 12V Car Battery Charger with Fully Automatic, Smart Battery Maintainer, Winter Mode - 2A/8A/15A - Compatible with AGM, Gel, Standard Batteries with UL Certification

todo llego muy bien en su caja y funciona a la perfeccion ya puede cargar mi baterias de gel sin problema

CATEGORICAL GRADING Presentation/Packaging: A Quality/Craftsmanship/Materials: B Price/Value/Worth: B Functionality/Utility/Versatility: A Instructions/Ease-of-Use/Comfort: A Marketing vs Reality: B (Where “C” = Average) I got this to replace a 40 year old Craftsman charger (which still works fine as a trickle charger). This charger is much lighter and has a plethora of features compared my old one (which is metal and gets very hot). This one is essentially plug it in, hook it up and forget it until tomorrow. One can read about the many features on this Amazon listing. I keep an outside the vehicle battery (that I purchased for my old truck but did not install before I sold it) and take it with me when I need to jump someone’s car, so basically I use it to power auto starters (and sometimes for other 12 DC needs). Right now I don’t have a battery maintainer on it. It tested out at 80 % charge in my tester. Connected the charger, which also read 80%. Set it to auto and checked on it a few times the rest of the day. It actually discharged it some more before charging began (see images). The seven stage charging process on Auto takes some time. I connected it around mid-morning and it was not charged by late evening when I last checked it. The charging unit, never got hot. The next morning the battery was fully charged. I like the 7 stage charging - hopefully that will equate with increase battery longevity. I also really like that it seamlessly operates then shuts down 24 hours after the battery has been charged (goes to pulse maintenance mode once battery is charged for those 24 hours). The auto mode varies the charging rate based on its diagnostics, but you can force it to trickle, quick or rapid charging if you desire. Again, at no time was the charger warm to the touch. Additional likes: UL certified, detects poor/improper connections, battery safety protections, lightweight, comfortable handle, cord wrapping hooks. Dislikes: No 6V option MOST SUITABLE FOR: any situation calling for a portable 12V battery charger *PRECISE RATING: 4 RECOMMENDATION: I can recommend this charger with enthusiasm based on these early use impressions. (As always, I will report back if there are any durability issues with additional use.) PHOTO INFO (photos are loaded in order, but may be rearranged when finally posted): 1) Baseline battery test with separate unit 2) Battery test indicator on the LVYUAN unit 3) Initial screen of LVYUAN unit after toggling AMPS button 4) Staging screen (screen automatically switches between displays 5) 15” later it is at 70% capacity 6) 2.5 hours later 7) Next morning reading Thank you for taking the time to read this review. I hope it was helpful. Good luck with your decision. *Rating scale: 5 = definitely buy again, happy to have it (exceptional in several characteristics,) 4 = probably buy again (decent job of doing what I need, excels in one or two characteristics) 3 = perhaps buy again after researching options (functions OK, looks OK, decent quality, average life expectancy but no outstanding characteristics) (in other words, average) 2 = would not buy again (low end/below average merchandise and/or service, but not totally worthless) 1 = sorry I bought it the first time (poor performance in several characteristics, no redeeming characteristics)

Good charger so far. Keep 3 boat batteries good to go with this.

I tested this charger on a 5 year old AGM battery in a vehicle that is regularly driven. As batteries age, their capacity decreases. The charger indicated the battery was at 50% capacity before charging. The charger displayed 100% at the end of the cycle. Later, the battery was back at 50% which is to be expected due to age. The battery is not capable of maintaining the capacity of a new battery. My testing was just to observe the operation and different phases displayed on the LCD screen. Use of the charger is really simplistic. After plugging into AC power, the LCD display instructed me to “put the clamps on”. I purposely connected the clamps wrong and the charger displayed “reverse polarity” (SEE PICTURE). The number of soft buttons on the charger is minimal. I only needed to use one to start charging – “Battery Type” set to “AGM”. The “Amps” defaulted to “Auto” which is the best setting for battery charging. If I was in a hurry, I could have set to 8A or 15A. Slow charging takes longer but will charge more thoroughly. Since I did not press the “Charge” button, the charger automatically started charging about 30 seconds after I entered the battery type. The LCD displayed “Capacity: 50 % Voltage: 12.2V” CHARGING: (Refer to the bottom of this review for explanations of each charging “Phase”.) The first 2 phases (Desulphation and Soft Start charging) were skipped. The “Bulk” 3rd phase displayed the battery was at 60% capacity and charging at a 2.0A level (SEE VIDEO). As bulk charging continued, the amp level kept displaying at continuously decreasing amps. Eventually, the “Absorption” phase displayed when the battery was at 80% capacity with the amps decreasing as charging continued. Finally, the “Float” phase displayed with the battery at “Capacity: 100% and Voltage: 12.8V” displayed. The charger can be left indefinitely connected to the battery to maintain a 100% charge. The phases above progressed successfully. DEEPLY DISCHARGED BATTERIES: The “Recondition” soft button is used when a battery is deeply discharged. The charger will attempt to recover the battery. The charger will go through all the phases above but a 6th “Recondition” phase will be inserted. MANUAL: The manual is well written including pictures and descriptions of all modes & information the charger will display. EXPLANATION OF PHASES: The charger goes through a possible 7 phases when charging: 1. DESULPHATION - Sulfation refers to the process of building up lead sulfate crystals inside a lead-acid battery. Due to sulfation, battery capacity gets smaller and smaller every day. Desulfation is the process of renovating lead sulfate crystals inside the battery. After the lead-acid battery has been desulfurized, you can use it again with almost its full capacity 2. SOFT START charging - Uses electrical pulses to charge batteries in a more efficient and safe manner. This type of charging helps extend the life of the battery and prevent it from being overcharged or damaged by heat. 3. BULK charging – Bulk of Amps charged into the battery. When the battery voltage reaches the specified absorption voltage (V), bulk charging stops. 4. ABSORPTION charging - As the battery gets fuller, the charger requires less amps to maintain the battery at the specified V. Eventually the number of Amps drops to almost nothing to hold the battery at the specified absorption V. 5. BATTERY TEST - The battery test monitors the voltage and determines the state of charge of the battery. If the battery test fails to charge successfully, reconditioning mode occurs. 6. RECONDITION charging – If Battery Test indicates reconditioning is necessary or if the “Recondition” button is pressed. During this mode, a steady and constant flow of current is sent to the battery to recondition it. This steady current flow is applied until the cells and the electrolyte solution become equal in charge. 7. FLOAT charging - The charger trickles the lowest number of Amps to maintain the Voltage. I recommend this charger.

We have two cars, but as we've gotten older, my wife's car mainly sits in the driveway. The battery has drained more than once. I've been using the battery charger my dad gave me back in the '90s for more than 20 years. Its gotten rusty, crusty and unpredictable. I figured it was time for a change. When I started looking into it, I was amazed at how far the technology has advanced! From the looks of it, the LVYUAN 12V Car Battery Charger is a fully automatic, smart, versatile charging solution that supports multiple charging currents of 2A, 8A, 15A, and AUTO. It can handle a variety of battery types including AGM, GEL, Wet, MF, EFB, Deep Cycle, and of course, standard batteries. Best of all, it's fully automatic. It will initiate charging without the need to press a start button and can adjust output power according to battery conditions. It's smart, with a 7-stage charging process that improves battery life and performance. You can read about the different stages and modes on the Amazon site. Safety features I like include protection against overheating, reverse polarity, extended time, and short circuits. I love the LCD screen with real-time charging updates that lets me keep track of the process. I guess if you live up north, the Winter Charging Mode helps in cold weather, shielding the battery from the adverse effects of low temperatures. I would think this is smart choice with on-board intelligent features to keep everything charged to the max in a safe, efficient manner. This is a State of the Art solution that just makes everything easier. And easier is always better. Unfortunately, the prongs are a bit small to fit over the connectors on my Toyota Sequoia SUV, but I was able to clip onto the edges which worked well enough. You should be able to make it work for you. This is a big improvement over my old charger, lightweight and smart!

I have a larger unit at home that I have used for years but not really suitable for taking along. The last time we went camping, I found that the battery of my towed car had died along the way. I probably left something on that drained it. I have a set of jumper cables but they were not long enough to reach the front of the RV where the battery is located. So I ended up trying to find another camper to pull close enough to reach with my cables. Luckily most campers are willing to help others any way they can. I have plenty of room to carry this charger along if it ever happens again. I already carry a 50ft extension cord so I can power the charger from the RV if needed. Anyone that has ever done much camping knows to always expect the unexpected.

Scanning the automotive chargers on Amazon I see that most good chargers with smart and automatic functions cost a lot less, though most of them provide only 10A max, vs 15A max for this charger. This charger appears to be decently made and designed. I like the digital display and the prongs on the rear for wrapping the cords. I also like that the air vents for cooling are on the sides rather than the top. The charger that I have long used has its vent holes on the top. Living in a rainy climate I've worried that some mist might someday get in there. I see another charger on Amazon, TowerTop brand, that looks quite similar and has similar functions, that is currently the same price, but weighs more (a quality that I lean toward vaguely using as a proxy for build quality) and produces up to 25A, allowing it to also serve as an "engine starter." I searched the web for a digital pdf manual, but found none. In the course of that search I found the Lvyuan website. Current chargers on that site do not include this model. It offers three chargers, all with metal bodies. The one most comparable to this one is a 20A smart charger that costs substantially less.

Came in great condition! The only way to test it out is on a dead battery but none of our cars have conked out on us so I’ll have to wait to test it out. But it arrived as described and nothing is chipped, broken, frayed, or refusing to turn on. So I’m happy with it.