DSR Pro, 100A Heavy-Duty Car Battery Charger and Power Supply, Service Mode, Flash Reprogram, Boost Charge, Professional Grade, for 12V Automotive and Marine Batteries, INC100

I am an extremely satisfied customer and would recommend this charger to anyone. I purchased this battery charger about 1 year ago, and have waited until now to post a review because I did not want to mislead anyone. I can safely say this is one of the best products available on the market. PROS: Accurate power display Versatile charging settings Compact design for easier storage and relocation solutions Large low gauge wiring for both the charger leads and electrical outlet plug High volume twin ventilation fans and heat dissipating fins on body CONS: Battery clamping jaws may be too large for some applications Somewhat hard to understand automatic charging logic No cranking assist Working in a dealership, the shop provided chargers were completely unreliable and had no advanced charging functions. All it took was one failed charger mid programming, and I ended up spending 3-4 hours to fix a job that ended up paying 0.6 hours. I then decided that was enough and I needed to buy a heavy duty charger of my own. I wanted something compact that could fit in my tool box drawer for security reasons, and to make sure nobody would use it when I wasn't around. I also needed something with flash program functions to keep the voltage steady. This charger answered every need of mine and more. I am not sure who is the real manufacturer of this charger, but I have seen it rebranded under OTC and other automotive specific tool brands. It also uses a very similar charger function interface as the roll around Snapon EEBC500 unit, which is what drew me to this charger. But this charger's main advantage is the flash programming mode which allows the user to set the voltage from 13.0V and higher and the charger will automatically adjust amperage to suit, from 0 to as much as 70 amps. The large fans keep this unit cool which will aid in it's life and the low gauge wiring appears very strong and will hold up. There are sometimes the jaws will not fit on the battery itself and can only be used on the jump start terminals, so depending on different vehicles this may be an issue but it has not been for me as nearly all of the vehicles in the brand I work for have jump start terminals. It is likely possible to switch out the jaws anyhow. One odd thing is the automatic charging function which sometimes I don't understand. I am not sure if it uses the battery's internal resistance or is aiming for 12.6 volts 15.0 volts or what the case is, however I am confident it will not overcharge and "cook" a battery if left alone for hours. Overall I am very happy with this purchase, it is a tool that I feel is reliable and will last a long time as I use it almost everyday. Many technicians in the shop I work ask where I got the charger from as they can see by the build and functions this is a high quality product. Amazon has the most competitive price I found around and the purchase went smooth.

This battery charger/flash programmer works great. It has a nice forum factor, quality cables, and an easy to understand interface. The noise from the cooling fans aren’t intrusive to me, but I can see why some people consider them loud. Don’t let that deter you. I’ve used this for Porsche PIWIS programming and it did what I needed it to do without issue.

I got this primarily to do some coding on my BMW. I am an enthusiast, not a professional, so it was a bit of a splurge (though if you think in money saved by not going to dealer, I still came out *way* ahead.) Anyway, it worked very well for that. You can actually monitor the amperage draw which I found rather neat. But I found another way that I can get a return on investment with this and it is properly charging/recovering batteries for longer life. I had a previous "Die Hard" smart charger and it was fine for simple charging if you are patient. But, I have a few motorcycles and even on maintainers, I've had battery issues from not always riding them very often. I had a rather expensive Odyssey battery that had seemed to of "died". Wouldn't take a charge on the smart charger, wouldn't hold a charger after jumping the bike, yet it really wasn't that old as far as that type of battery is concerned. I threw it on this bad boy and listened to the fan go up and down as the machine did all kinds of cycles for hours. I assumed this was the desulfation program or something. But, the battery seems to be happy again though we'll see if it continues to hold out. That right there saved me from chucking a 2-year old Odyssey battery and replacing it with another though which is more money saved. I might just get in the routine of regularly hooking this up to my more sedentary vehicles to make sure they keep a good charge and healthy condition.

A professional charger and clean power unit. I'm a heavy duty diagnostic specialist. I do allot of reprogramming I can set the voltage and not worry about it when re-flashing a module. The charger side is great, connect it, set it, and it takes care of it self. No more resetting a timer and worrying about over charging a battery. Just a update,I've had this charger for over a year now, I've had no issues with it. Second update, January 2016, I'm still using the charger. A co-worker borrowed it and accidentally connected it backwards to recharge a battery didn't hurt it bit. It still works just like new. I noticed the price has gone up quite a bit from what I paid but it's still a good deal.

I bought this so I could do software and programming updates on my F150. It has performed flawlessly so far! It is extremely well made, not like the plasticky consumer grade models. The fans sound like they’re high quality and they kick on as necessary.

Ultra high quality charger! This unit has no trouble supplying all the current needed to program BMW's and other vehicles. VERY stable voltage when using programming mode. Charging modes seem to work as expected! It is lighter than I anticipated and easily portable. The cables are high flex type which makes it easier to gather them up after a job. Also, the cables are long enough to easily reach any vehicles battery terminals while the charger is on the ground. UPDATE March 11th 2016 - A few days ago i powered this charger up and the lights seemed to be acting funny.... NO output. Its dead. Called Schumacher and paid $60 to send it back. I anticipate they will send me a repaired unit, but I'm unable to complete the job i was working on for two weeks at best. Don't know if i will trust it for programming after this.

I needed a solid supply when running diagnostics on my Jaguar, I am very impressed as I can set the voltage required and it remained constant while performing multiple load and stress tests. As expected, this unit has some weight to it and comes with heavy duty cables but portable. As I'm use to the larger wheeled units, I'm going to have to make or acquire a stand or cart for easier functionality in the shop. To date, I have nothing negative to point out with my experiences when using.

Love it! The best power supply I ever met!

works great..

Awesome product!!!!!

If you're looking for a power supply for flashing this unit is excellent. However as a charger it's completly useless in Auto mode I have no idea what it does as it keeps the voltage very low and I once came back to a battery installed in a vehicle showing 11.7 V! and green led illuminated indicating charging was finished. In manual mode it's slightly better but u need to select a higher Amperage yhan needed to get it yo charge, ex I tried charging battery that was at 12.3V selecting 4A yielded no result voltage increased to 12.4 and Amp was 0.4A, switching to 40A setting provided around 14V at 1.4Amps.... Also while it can maintain up to 70A for flashing in manual charging mode it'll hold it for some time then switch down to around 40A then back to 70A, I guess it's to prevent overheating but it also means it's not designed for 70A continious. Also first unit I got would not power up in cold ambient temps(-5C*), but replacement from Amazon works fine.