Review on 🔋 Energizer 2-Amp Smart Charger: Fully-Automatic Battery Charger, Maintainer, 6V and 12V Trickle Charger with 7 Step Smart Charging Technology by Michael Hogate

I am totally impressed with the Energizer 4.0 Amp Charger. I work in the taxi industry and my taxi has to work 24 hours a day. As soon as a taxi shows signs of a battery problem and the alternator fails, I change the battery immediately. I had 3 used batteries that were defective. And left them in storage. Battery number 1. This battery has been in storage for 7 years and I thought I would use it as my main depot. The battery voltage was between 6 and 7 volts (very low). I connected a 4 amp Energizer charger and immediately started charging at 6 to 7 volts. It took about 27 hours to fully charge the battery. The only problem is that after 24+ hours it showed code E3 (overheating code but the Energizer 4.0 amp charger just got warm). I just unplugged the charger, waited 30 seconds and plugged it back in. The energizer worked until the battery was fully charged. I also have a Ctek 3300 charger and when the battery voltage is too low I have to charge it first with my old Schumacher charger to give it a bit of a boost. Then Ctek could start charging the battery. Battery number 2. The second battery is new (6 months old) but was weak and was even able to turn on the interior lights. The voltage across this battery was 10 volts. The Energizer 4 amp charger recharged with no issues. After about 20+ the battery was fully charged. Battery number 3. This third battery was stored in the car for five years. This vehicle should be used for spare parts. There was no spark when touching the battery terminals. I thought this battery was dead. I accidentally plugged it into an Energizer 4.0 amp charger and it started charging the battery. After about 24+ hours an E3 code appeared but just unplugging and waiting 30 seconds, plugging back in was fine. I don't know if the Energizer has an internal timer and if the charger will turn itself off after more than 24 hours. The charger is not hot and warm at best. Batteries #1 and #3 were heavily sulphated. There are 9 steps: Step 1 Diagnosis and AnalysisStep 2 DesulphationStep 3 Pre-ChargingStep 4 Soft Start....Slow Current ChargingStep 5 Constant Current Charging....Current ChargingStep 6 Constant Voltage to Almost Full Charge 12.8 volts for 2 minutes. The charger determines the status of Stage 9. Recovery. When the battery drops below 12.8 volts. The charger will automatically begin steps 3 through 6. When I first saw this charger I jumped at the chance and ordered a 4 amp Energizer model. I was very surprised. It's the best charger on the market today and costs less than $29.95. (Ctek $69.00). Next I will buy an 8 amp model. The Energizer ENC 4amp upgrade can remain connected to the load (e.g. still connected to the car). With no load my battery registered 12.5 volts and with the Energizer charger for charging (outside the car) it reached 14.75 volts. When the vehicle is running on alternator charge without the Energizer charger, the reading is 14.0 volts (normal). If the Energizer charger is connected with the engine running and the alternator charged, the voltage will be 14.6 volts. The key to the success of this charger is that it first detects the voltage and then adjusts the charging speed. With or without a load. The charger is made in China. Software/design must be developed in the USA. It is by no means a loading software that is designed and manufactured entirely in China. It overtook Ctek chargers.