November 2017 Update: I acquired a 1999 Porsche 996 911 Carrera 3.4 in January 2017 in excellent condition with an Optima Red Top Battery that had not been charged as often as it probably needed to be. These P-Cars are known for having huge issues with battery drain while sitting, and this red top seemed to struggle to start the car on a warm FL summer day when I first got it. In went the cigarette lighter charging adapter (911's are designed with this cig port to be used with system charging in mind and has a max or 7-8 amps of charging input, so it's safe to use on a continual basis). I first selected "recond" after the charger error'd out a few times as I attempted to initiate a charge cycle on the normal setting. The cycle started and took a little longer than 8 hours. After it completed, the car now started much easier (though, I still remain unimpressed with the red tops from optima; it has almost 50% more CCA than the OEM battery). I use the AGM mode for best Optima Battery results.I appreciate that CTEK makes it impossible for it to overcharge the battery OR damage my car's electrical system. The Porsche Techquipment charger is a rebranded and simplified MUS 3300 which they sell for over $200 USD. The 7002 is more functional, more powerful, and less expensive. I won't be using another battery charger brand. CTEK keeps earning my business.****************************************************************************************************I have been using this for a few months now, on four different batteries (2006 Toyota 4Runner 4.7 V8, 2013 Nissan Altima 3.5 V6, 2013 Ford Explorer 2.0T, 2003 Ford Explorer 4.0 V6 SOHC). The 2003 Explorer battery is 3 years old and the 4Runner battery is 5 years old and I live in Central Florida (hot hot heat for most of the year). Each of these were minimally affected by a Battery Tender Plus even when left on that for an entire week.I suspect that some people who use the smaller MUS 4.3 charger I’m sure this thing does good electric stuff whatever but I will testify this little guy is durable- it was plugged into a trickle charger in my trunk and I left and forgot to unplug it. I proceeded to drag this down the road for a good 6 miles until a fellow motorist alerted me to it on the highway. Took it home and it still works nice although it won’t win a beauty pageant.Works great. Purchased this for my BMW to keep charged while in storage. I attached the quick disconnect to the battery so it's easy to remove the battery tender when I want to drive the car. Used this charger for many months with no issues. Highly recommend.As the title implies, this is a very expensive battery charger but is certainly worth the cost when the vehicle in which the dead battery resides needs to be charged properly and correctly. If you have a collectors car or a garage queen this is the perfect charger for you because it does an excellent job as both a battery charger and battery tender. If you want the best and if you want it to work 24 hours a day for years on end, this is the battery charger for you.I bought this for my AGM battery. Has several settings for other batteries too. Has been working well for my classic car that sits for long periods in garage. I understand Jay Leno uses CTEK.Needed for the AGM batteries in my Jeep. Assesses the batteries and with multiple modes one specifically for AGM batteries charges in just a few hours. Not inexpensive but worth the money.My first use of this charger was to try and recover a battery from a pickup truck that was 3 years old and had been sitting unused for several months. The voltage had dropped very low, not sure how low. I had tried to recover it with a Schumacher SSC 1500a ship n shore 2/10/15amp charger. I hooked it up twice and after some hours in each case the charger reached a reported 67%charge and then stopped charging and reported a bad battery. This Schumacher charger still will charge a battery that is not too far gone. Next I hooked up the Ctek 7002.The Ctek has a mode button and a total of 12 LED indicator lamps labeled 0 through 6 and A through E. I pressed the mode button for normal charge. The following indicator LED's on the charger dashboard where on: A ( power to charger), B (normal charge),1( flashing indicates the charger is starting in desulphation mode). After a while LED 1 stops flashing and stays on ( starting phase for charging at a lower voltage) When the battery terminal voltage reaches a preset level the next phase of charging is initiated. Im my case this level was not reached before 8 hours so charging was suspended and the Lamp 0 (error) was on. This could mean a bad battery or it might mean the battery was very discharged and you need to try again. I hit the mode button again and the charger started again in normal mode LED B and charge LED 2 (bulk charge) were on. The terminal voltage was above 12 volts at this point and with the charger connected the charging voltage was 13.5V. According to Ctek the charger decides what voltage to use based on the condition of the battery but the maximum voltage in normal charging mode is 14.4 V. After some time LED 3 (absorption charge) came on. At the end of this stage the charging voltage has tapered off the charger stops charging and the charger checks the battery terminal voltage over a period of time and if it drops too quickly the error light comes on indicating the battery could be faulty. My battery made it past this step without triggering the error lamp and went into stage 4 ( maintenance charging), LED 4 is on. For 10 days the battery receives a constant 13.6 volts and then goes into pulse charging every time the battery looses 5% of it's charge. In pulse charge mode the charging is interrupted when the pulses reach 14.4V in normal mode. The battery can stay in this stage for as long as you like(just add water if needed). The terminal voltage (charger disconnected) was at 13.3 volts. This is better than I could get with the Schumacher. I hooked the battery up to the Schumacher at this point and it reported 100%charge. In my case since my battery was severely discharged when I started, I switched it to recondition mode LED E and LED 2 came on. After awhile the LED's cycled through the charging stages until LED 4 came on again. Ideally the battery would then go into recondition mode, LED 6 on, the charge amperage goes to a constant 1.5 A and a maximum 15.7V. After a period up to 4 hours the charger goes back to maintenance pulse charging and LED 6 is still on. According to Ctek there is not a definite amount of time before the charger will switch into recondition mode and in some cases a battery may be still usable but never be able to go into recondition mode because it can not achieve full capacity even though it is as charged as it can get in it's degraded state. I suppose the lesson here is keep your battery desulphated on a regular basis and recondition it as soon as possible after a deep discharge for longest life. This was not made fully clear in the manual so I hope you find this information useful. I am waiting to see if this battery makes it to recondition mode, if it doesn't I will put it back into service and update the performance of this rescued battery after it has been put back in service for awhile. I have other batteries to recondition so I will report back on my success with them as well. I am giving the charger 5 stars for build quality, and the fact that it seems to work better than my Schumacher at making my battery usable again. The manual has the basic information in it to operate the charger which is fairly easy to understand, but I would have preferred more detailed descriptions of what to expect as far as outcomes and what is going on during the different modes of operation. The case has a pocket for the manual, very nice.This charger is basically self explanatory ......7.0 amps which will charge a battery faster than the others which is the main difference why I always choose this model.Some have a complaint with the Mode Button.....if one presses it normally.. not too hard it will last with no problems at all......I have never had any problems with this....in all the years I've been using C-Tek Chargers.It has all the 8 steps of charging condensed to 4 steps...no sparks plug in and connect...except in the recondition mode.....comes with a storage pouch....clip connector and a quick connector for quick connection to the charger. It also comes with a 5 year guarantee !I have one of these 7000 series for each one of my cars.....just added another !Now....Is It Worth It ?.....Speaking from my own experience with many years using C-Tek Chargers.....Yes it is !Never had a problem and I think they are the leading and best chargers out there that the other competition are trying to beat !I purchased this charger 3 years ago. At the time I thought the price was super expensive but I decided to trust the reviews and the good name of CTEK. Well I'm glad I did. It has been a rock solid reliable charger that has been doing an amazing job keeping my vehicle battery fully charged and maintained. I have it mounted under the hood of my vehicle and I plug in my vehicle any time it's resting in the driveway to keep the battery fully charged and maintained year round and also warm in the winter. I'm happy to report that my 3 year old battery is still showing 95% usable capacity thanks to this regiment. That's right. The battery it's maintaining which should normally last 5 years and is 60% through what should be normal life is still showing 95% of it's CCA capacity still. That is a testament to the charging program and quality of this charger. I've since bought more of these to maintain my lawn and garden equipment and generator batteries etc. They are just awesome and I would highly recommend them. They are worth every penny! Far better than the less expensive competing brands sold on Amazon! You get what you pay for and this is it!Purchased this unit on the recommendation from a battery store as I needed to recondition (equalize) 26 volt Trojan 105 golf cart batteries connected in series i.e. a 12 volt unit. These are 3 years old.3 of the cells had below normal specific gravities of <1.250 when fully charged, the other cells had optimal S.G.of 1.277. The batteries would charge up normally but would discharge at an unacceptable rate compared to new batteries when used in my travel trailerPut the batteries through a reconditioning cycle after fully charging them. Rechecked the cells specific gravities and nothing had changed. Repeated the process and still no improvement so basically this unit is just a very expensive battery charger.Returned the unit and after researching options I purchased a Pulsetech Xtreme Charger that desulfates the batteries and is much less expensive than the Ctek unit. After connecting the unit to the batteries for about 7 days, every cell had an optimal S.G. of 1.277So based on my experience this Ctek unit does not deliver a sufficient overcharge to equalize deep cycle golf cart batteries, whereas the Pulsetech unit works by removing sulphates by using a high frequency pulsation and is very effective.Have a 2014 Benz C350 4matic, battery was out putting 11.7 volts and system started shutting down features in the car. Dealer wanted $400+ for the battery alone. Read reviews on CTEK Multi US 7002 that people use it on high end European cars, was surprised that the unit charged the battery backup to 13+ volts in 6 hours (in -12 degrees temp) all the features in the car resumed function once again. Please read the manual first before connecting to the car and plugging unit in the wall, follow the process to avoid accidental damage to components. Recommend the product.facile a utiliser. durant le confinement nous utilisions qu'un seul de nos véhicules, ce qui a eu pour effet de décharger les batteries de nos 2 autres véhicules. J'ai utilisé le mode charge et le mode reconditionnement, fonctionne très bien.bonne longueur de fils, vient avec un kit de fils que l'ont peut laisser en permanence sur la batterie ou des pinces. facile de changer des pince au fil permanent, juste a débrancher et rebrancher par le quick-connect. ne fais pas de bruit. viens avec un sac de rangement utile.