KawishKawish Full Automatic Car Battery Charger 12V/10A | 24V/7.5A Intelligent Pulse Repair Battery Charger Truck Motorcycle Charger with Terminal Clean Brush for Automotive,Boat,Motorcycle

I purchased this for two reasons: it has 12/24v capability, and it is more than just a trickle charger; it restores a dead/completely drained battery. My '91 Corvette is hard on batteries, and I've replaced two of them in the past couple of years. It's not the car's fault; I put a couple thousand miles on the car a year at most. I have Battery Tenders and Battery Minders, and they work very well when you remember to run around the garage connecting everything. I try to do this once a month or so, rotating between vehicles... but I skipped the Corvette for a couple of months, and then tried to start it one day and it was dead. I hooked the Battery Minder up but couldn't even it to light up and show it was charging. I'd been looking at this device for a while for a 24v tender/charger, and finally bought it... it is a LOT cheaper than a brand-new battery.When it came in, I was surprised... it's about half the size I would have thought based on the images. about the size of a cigar box or a box of Triskets. Despite the Russian/English labeling on the front panel, it's made in China (perhaps for the Russian market?). At any rate, after reading the instruction and the cautions I went out and hooked it up, placing it in Automatic mode. The flashing multi-color front panel buttons make it very impressive... but will it work?Well, I've had it on the vehicle for about 6 hours. The device initially read that the battery had a 41% charge, but no internal lights, no ignition whatsoever. It was well below 10v. The device started its cycling between trickle charging and desulfinating/pulsing, and in a minute it showed an increase to 42% capacity. I checked on it every hour and when it got to 90% I disconnected it and tried to start it. The engine turned over and started up! Great! No new battery needed! It's late in the evening, and after reading the manual I don't think it should be left connected and unattended so I've disconnected it for the evening and will top the battery up tomorrow. But, I am one happy buyer.Considering that a new battery for this vehicle is well over $100, it's paid for itself already. Even if it quits on me now I've saved money. I'll update the review after a few months of ownership, but as of now it certainly is worth the under $30 price tag.Note: I've continued to hit the Corvette with it, and the battery is now fully charged and holds a charge. I'm currently using it on my '84 CJ-7... I swapped a 4.3L Chevy Vortec V6 in the late '90s, and because the ECM is wired up directly to power it drains the battery. I have a battery disconnect, but my son drove it last and forgot to disconnect the battery... and it's deader than yesterday's fish. I threw it on the charger overnight and it went from not being able to take a charge from another charger (Battery Tender, gave a 'fault' indicator) to slowly starting to accept a charge and then as current increased showing the battery was way, way down... and charging up fully by the next morning. I threw it back in the CJ-7 and it started right up. So, that's two auto batteries I've brought back from the dead, saving me way over $200, making this the best $30 I ever spent.ADDED: I also have a 2003 M1097A2 HMMWV that is currently being stored in a storage unit. It has very low miles (less than 100), has been serviced, new batteries (two 12v 6TL batteries in series for this 24v military vehicle), but I hadn't started it since last spring. I went down there a few days ago and it didn't have enough juice in the batteries to charge. There were no outlets, so I plugged the Kawish charger into a Rockpals 500W portable battery station that was fully charged. I could not get a voltage reading out of one of the 12v batteries, the other read at under 10v. So, I charged the 10v battery for a half-hour and got it up to 12.6v and a reported 65% charged rating. I then hooked it up to the two batteries (the negative on the 'upstream', the positive on the 'downstream') and the unit automatically switched to 24v mode (because two 12v 6-cell batteries in series are effectively one 24v 12-cell battery) and started charging. An hour later and down to around 50% on the battery station and I had enough charge to fire up the HMMWV and its 400A 24v generator. I pulled the HMMWV out, used the throttle lock to set it a a high idle, and was able to reach the lightbulb 12' up by backing my pickup into the unit and standing on the tonneau cover. I replaced the bulb with a socket extension that also had two 2-prong outlets in it, plugged a 6' extension cord into that, then pulled the HMMWV back in. Now I could power the Kawish off of 120VAC. I left it hooked up to the batteries in series to get a 24V charge and two days later both were fully topped off. Saved me another $600 in batteries and it was able to get the HMMWV to start without having to haul a generator down, pull the batteries and charge them at home, etc. This thing is so useful that anyone who owns cars, motorcycles, ATVs, airplanes, even 24V military vehicles can't afford to not have one.2025‐06 EDIT: I've had this for 5 years now and it's still going strong. I modified it by cutting off the battery clips and soldering/crimping an SAE connectors to make it compatible with Battery Tender accessories... my motorcycles and ATVs have Battery Tender connectors installed. With a 1 to 4 SAE splitter I can charge 4 bikes or ATVs at the same time (effectively one 12v 60 AH battery) and leave this plugged in overnight without worrying about boiling a battery, which can hapoen if you leave a Battery Tender plugged in for too long. Makes charging up all my vehicles incredibly easy.

The unit is smaller and lighter than I thought. Only one selector switch and NO push buttons. The manual mode would better be called " almost manual mode " Compared to hard core, heavy duty 10 amp chargers, this unit seems small and light. The wires going to the clamps are short and use small gauge wire. Also, this unit is listed as 12v & 24v as well as manual and automatic. I'm skeptical because there is only one control switch. You can switch between auto and manual, but you can't select the voltage. This means that it must sense the voltage of the battery. I usually use a manual battery charger to charge completely dead batteries. Automatic chargers usually can't start from zero volts and after using it, this one is no exception.I really like the information about the charging status that is shown on the LCD display.I have tried this on two batteries that were completely totally dead on vehicles that have been sitting for over a year. On the first vehicle, this charger worked as it should on manual mode and started charging the battery. After an hour, I switched it to automatic mode and it was able to revive the battery. Ont the second dead battery, this unit couldn't get a read on it and it wouldn't start manually charging. I had to use another charger on jump start mode to get the battery started,. After that this unit was able to take over on manual mode.-- I would call this chargers "manual mode" "close to manual " is still has to sense the battery's voltage before it will start charging. --Note: in the photos, there are 9 little white buttons show. These are just indicator lights. These are not modes you can select. They just light up to tell you what the unit is automatically doing.

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I actually bought another one a couple years ago as well with the same result. The only problem I have had with both is I had to resolder the battery connectors to the wires as they were coming off. I have used this a lot but they should probably improve the way they connect this. Other than, it has been perfect and still works like day 1.

The user interface is very vague and 20 minutes after ordering it, I realized what I thought were manual buttons to select modes were in fact just indicator lights from it's automated microcontroller.*I bought this for one primary feature anyway*Manual mode only allows you to bypass the software, and push a hard and hot current with over 16 vdc of electrical pressure. You cannot turn on any other certain function.This function is the primary reason I bought it, so there is zero regret in this purchase.It does not indicate if it's in repair mode, so I assume it always runs a PWM D.C. algorithm to charge in automatic mode?It charged 2 batteries another smart charger claimed were dead.One a car battery, the other a 12 vdc sealed lead acid battery with I think a 12 of 15 AH rating.It did nothing on other questionable batteries I connected.No diagnosis on the seemingly fancy LCD and information lights.No manual override pushing a hot charge on the ones I tried; the batteries may just be that far gone.For $31 I thought I would get more.Manual access to all modes, battery diagnostics, overrides etc.; it has none of that but could with some buttons added to the microcontroller ports!For about $18, other models do, but I am not in regret over buying this because it can blast a cell with 16+ vdc.A dead car battery will be ready to start in literally 10 to 20 minutes, and I didn't have the money to spare on a charger with a jump starter. In fact I have a spare car battery that just needs charged to do that!So for practical applications beyond the common house wife and yuppie dad, this has a highly desirable feature generally far more expensive.