It tunes them up (Rating: 4.00)
Review : Replaced my old charger with this one. Made a big difference with my older batteries that would not take much of a charge. Gave some new life to them. If you are a user of cordless tools, you know that batteries are the big maintenance expense. While my figures are not scientifically valid, my best guess is that this charger will extend the life of the batteries at least 20 percent
Throw away your old charger! (Rating: 5.00)
Review : I purchased this charger at the same time I bought my 14.4 cordless drill (Firestorm). This charger fully charges your Dewalt or Firestorm batteries in less than an hour (depending on how low they are when placed in the charger). My two batteries are still going strong after more than three years of frequent home use (the tune-up mode definitely helps). Never use the 6 hr battery killer that comes with your cordless tools. This charger is definitely worth the money, considering I would have spent at least twice as much on new batteries.
"Tune-Up" Makes this the Better Choice (Rating: 5.00)
Review : I traded up to this charger after one of my old ones quit. The "tune-up" mode really does make a difference. I tried a side by side test with my remaining old non-tune-up charger. I charged two depleted 12v batteries for 10 hours, using the "tune-up" mode on this charger. I then ran them in the same drill, and there was a noticable increase in rpm and torque with the "tuned-up" battery. The "tune-up" mode does take 8 hours, but it is only necessary every 8-10 charges. As DeWalt explains, the cells in the battery are wired in series and the "tune-up" charges the downline cells completely, where fast charging only fills the first few cells. All cordless batteries are a series of 1.5v batteries enclosed in a case. To get a full charge, all the individual batteries need to fill completely. If you have older batteries, this charger will give them new life. It is a worthwhile upgrade even for new batteries, as it will give them better performance and perhaps, extend their life.
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