KONNWEI 3 in 1 Car Battery Charger, KW510 Battery Tester 12V 5-Amp Fully Automatic Smart Charger Automotive Pulse Repair Maintainer, Trickle Charger Battery Desulfator w/Temp Compensation

****UPDATE*** This charger saved me already around $45.00 My lawnmower tractor battery was completely dead and upon checking / testing the recommendation was to replace it due to bad cell. Then I remained myself that I had purchased Konnwei which was sitting in a trunk of my car.,,,to my surprise this little device repaired bad cell and recharged the battery in less than 5 hours. It already paid for itself !!!!! and tractor starts instantly..... THANKS AGAIN ..... Needed the AGM battery charger/maintainer because my old charger is only good for regular acid batteries. Glad I found KW 510- it is a tester as well. I tested few different vehicle batteries and their charging systems. One battery needed re-charging, which was no problem for this device. Tested again and although voltage is there cranking amps are well below (367 out of 800). I left the charger ON for Trickle/charging/maintaining, to my surprise I am able to start it OK even thought CA are less than half of new working battery. Repair feature did not help resolve the issue, well battery is 5 years old but rarely used-that is what most likely killed it as well. When I get new one I will leave it connected so it can be gently maintained/trickled with very low amps. Time will show how the unit performs, but as of now I am happy and can recommend it.

Great value for the money. Charge and battery analysis test functions work great. The unit is rugged and easy to use. Now let's talk about the battery re-conditioner function. Same technology as most other units on the market, but warning - this will not perform miracles on old, dead-dead batteries. For relatively decent shape batteries reconditioning helps. When tested on a severely damaged (heavily sulfated) battery, they are most likely too far gone for this (or any similar unit) to make like-new again. In other words, worth buying but keep your expectations in balance.

Recently received this and was able to try it on 3 different batteries. The results for each of the 3 batteries made sense. It has all the features I was after in a single unit. It was very reasonably priced, and I hope it holds up. While the directions overall were very good and clear, except for lack of explanation as to how long the Repair feature takes. I had to Google that and find that it can take 8 hours or more to complete and the unit doesn't give any indication it might take that long.

A good battery charger. I've never been able to save my battery with the special recovery function, but it charges and discharges perfectly.

I bought this in order to repair a car battery. It's really simple to use, but make sure you follow the instructions completely. Make sure to remove the battery from the car before using the repair feature! Make sure to have a good battery memory saver device before removing your car battery. I bought one on Amazon where you can plug it into the wall since the repair process can take a long time. It worked for me after having the battery disconnected for over 11 hours. When you remove the car battery, remove the negative first and then the positive. Make sure that the cables don't touch each other or any part of the car. Wrap the connections with towels to prevent shorting. When you put the battery back into your car make sure you put the positive on first and then the negative. It takes a long time to do the repair process, but it seems to be working very well. I look forward to using this in the future again if I have any issues.

Would have given 5 stars if the ad wasn't misleading. I tested this against other battery testers including another 3in1, a battery testers and a NOCO charger. This is a great tester, and charger. It does the health checks. It does cranking and charging tests. But it does not check or charge lithium batteries. It even warns so in the manual so IDK why they would put it in their ad that it can. Hopefully they'll refund me and I can keep this for free.

Great. It checks the battery in the car. Checks the battery health. And battery charge. And it shows the amperage when changing until 100%

One of my cars only travel between 2-3 miles a day. Without a battery tender or charger of sort, the battery in the car will die much sooner than expected. That was the main reason I bought this battery tester/charger. Twice a year, I would charge up the battery. At least I thought I did. A little more than 3 years later, just outside of the warranty, my expensive AGM battery died. I thought I charge it twice a year for the past 3 years. Just a couple of months before the battery went south, the tester said the SOH and SOC were in the 80% range. A word of advice: for something like this, just go to your brick and mortar place and purchase something in there. In this day and age, nothing is cheap up here anymore. If it is, it is too good to be true.

Ich habe mit einen Batterietester und dieses Batterieladegerät gekauft. Für euch habe ich ein Video erstellt wo ich das Ladegerät mal angeschlossen habe und durch das Menu zappe. Kurze Zusammenfassung : Batterien die etwas Leistung verloren haben können mit diesem Ladegerät etwas aufgefrischt werden (Repair mode) Das Display ist beleuchtet und die Sprache kann auf Deutsch eingestellt werden. Beim Laden wird Akkuladung in Prozent und aktuelle Spannung der Batterie angezeigt! Negatives : Das Ladegerät braucht etwas länger zum aufladen . Das Ladegerät hat wirklich eklig gestunken als ich es das erste mal angeschlossen habe . Nach dem dritten mal wurde es besser ... Es sollte nur benutzt werden wenn die Batterie vom Fahrzeug abgeklemmt ist. Sonstiges Den Tester hätte ich getrost weglassen können denn dieses Ladegerät zeigt nach dem Test absolut identische Werte wie mein extra dafür entworfenes Testgerät. Das bedeutet das dieses Ladegerät also auch eine wirklich ausgereifte Testfunktion beinhaltet. Ihr gebt an welche Batterie Ihr habt (CCA,IEC,EN,DIN,CA oder BCI ) und danach kann das Gerät ziemlich gut feststellen wie es eurer Batterie geht. Ihr könnt die Batterie auch noch reparieren wenn Sie noch funktioniert aber schon etwas an Leistung verloren hat. Ebenso kann man eine Batterie laden. Dies dauert seine Zeit und geht nicht so schnell von statten wie ich das eigentlich erwartet habe , aber auch das ist ehe von Vorteil für die Batterie .

Usefully tool, working well.

Działanie bez uwag, szybko i bardzo sprawnie ładuje akumulator samochodowy i motocyklowy

Good

Does a good job charging my AGM flat plate battery. It recovers from power outage and continues its previous task. Unfortunately, in Repair Mode, it tells you to disconnect car battery cables from battery terminals. Overall, 4 out of 5.