STANLEY BC15BS Fully Automatic 15 Amp 12V Bench Battery Charger Maintainer with 40A Engine Start Alternator Check Cable

My Optima battery requires a special charger. Very expensive. This is the inexpensive option and it works great. I needed it as I had a parasitic drain that I hadn't been able to trace down. (I've since found and resolved the issue.) This charger will charge a battery that has lost it's charge down to nearly four volts. I've used the repair option and although it is not always successful on an old battery it has repaired batteries that we use for the electric driveway gate (regular 12 volt car batteries) and the lawn tractor. The other day my sons truck refused to start. He thought it was the starter as there was just a click and the engine didn't even breath a sigh. He checked his battery with his cheap voltmeter and it said he had over 14 volts. (That can't be right. Kinda high.) Truck wouldn't start. I checked with my good voltmeter and got over 12 volts - more accurate. Truck still wouldn't start. Maybe it really is the starter. I pulled out this charger and checked the voltage. Just over 10 volts. Truck wouldn't start. Which was correct? I don't want it to be the starter. I left this charger hooked up to his battery and punched the 'engine start' button. Ninety seconds later I had him give it a shot and the truck fired up. I guess the charger was the most accurate volt reading. My son went and bought a new battery. (He had to get to work and didn't have time to repair the battery - with this charger.) This charger is and does what it claims. It will charge that AGM Optima. It will repair many worn out batteries, even though it does take a day or two, and that can save you a couple of hundred $$$. (Nothing can repair all worn out batteries.) The engine start capability works flawlessly. The alternator check function works great although it doesn't check the built in voltage regulator. Just a fact. Of course, this same charger is available under different brands with the only difference being the color and the name stamped on the front. Just find the best price and get it. July 2020 update: From five stars down to two. I only paid $60 for the 25 amp charger and I guess I got my monies worth. It worked great while it lasted, but after a year and a half it's useless now. I guess I was more fortunate than most people. When I check a batteries voltage the charger can't seem to make up its mind as I watch the value go up and down. No matter what voltage a battery has, when I try to charge then the charger immediately goes in to FLO mode. Engine start just goes into FLO mode too. Recondition is the only thing that seems to work anymore and I'm not sure about that. I did have another brand of 'smart' charger that I had to return immediately as it just didn't work. Now, no more Stanley's for me. I don't want a 'smart' charger at all anymore. Can't someone market a 'dumb' charger that will charge AGM batteries? Read more

I bought one of these a few years ago and it has worked flawless in a repair shop. Not the normal thing to use but it is very handy VS the large shop charger to drag around. I now bought another for my father to use! It has brought back countless dead batteries that wouldn't charge. The main reason i bought it was the recondition feature! The other was portability! It has paid for it's self over and over again! Some batteries it has brought back cost $180 new! This thing brings them back for a few more years! Use tips! 1 ignore the % gauge it is never right! 2 It will not charge a 100% dead battery. Hook another inline with it to get some charge in the dead battery OR use a old school manual charger to get some charge in the battery first. 3 If you know the battery is low but this charger hits float right away use the recondition feature for awhile then hit the charge button if you are in a hurry! 4 This is not the end all be all charger. You are actually much better off with a manual charger if you only have 1. They charge any battery from completely dead. That is when you need a charger most! But since i wanted the recondition part most that is why it was worth the money to have one! Read more

I have a 4amp 12v maintainer, but I needed a more powerful battery charger with a recondition cycle and something in the 15 - 30amp range. I picked up this Stanley BC25BS for $59.20 USD Feb 2024. I needed it as I had left an accessory on in our Class C motor home and killed the 6-month-old battery (two days out of warranty). I was headed out of town, and was able to get the charger overnight so that I could set it to a recondition cycle for the wife to watch while I was in another state. After running the recondition cycle for 24-36 hours, the charger went into float mode, and the battery and I were both happy. With the reconditioning and the accessories properly turned off the engine start battery has been great, and holding it's own. This is a great charger that can pump in 25amps; I have seen it say 29amps. It will do a 75amp engine start, and the main feature I loved was the recondition cycle. I did not need lithium, other features, or battery chemistries, which was perfect for my needs. If you are looking for a charger with the features of the Stanley BC25BS, I highly recommend it. ***Make sure you compare, there are many similar models with the same features selling for almost double such as the BC25BD (Black and Decker). Read more