Most helpful positive review
19 of 19 people found the following review helpful
Outstanding value in a fully auto battery charger
on September 14, 2009
I purchased my first Power On Board 25 Amp Fully Automatic Battery Charger from Sam's Club for ten dollars more than the current Amazon price including shipping. The device, alternatively marketed as a Vector or Black & Decker product, requires only a single button push to automatically select the proper charging rate for the attached battery. The peak charge rate is 25A, but the unit can also pump out 75A for up to 1.5 minutes to jumpstart your car.
Lead-acid batteries that have remained in a discharged state for a long time internally build up lead sulfate which can inhibit normal charging. This charger has an operating mode designed to recondition sulfated batteries.
A cooling fan runs while charging, but turns off when charging is complete. The unit then automatically switches to float mode to maintain the battery at full charge. This is very important not only for convenience, but also to prolong battery life. Since the fan turns off after topping off the battery, it works well for building up relatively inexpensive, large capacity, indoor UPSs built around deep cycle batteries (make sure that the battery area is well ventilated and place the battery on an acid resistant drip pan to prevent damaging the floor).
The lightweight, compact, microprocessor controlled charger features a backlit, scrolling LCD display that provides charge rates, status messages and battery diagnostic information. The device is built well, especially considering its low price. The battery clamps have copper contacts and the cabling is heavy gauge. All cables can be stowed inside the charger.
From my experience with the Power On Board 25 Amp Fully Automatic Battery Charger, the device is an outstanding bargain.
EDIT April 4, 2011: The charger has more than doubled in price since the time I wrote this review, so keep that in mind when considering it since there are other good chargers in this much higher price range.