Save up to 43% on La Crosse Technology BC-9009 AlphaPower Battery Charger
Brand La Crosse Technology
List Price: $69.95Price:$39.99 & this item ships for FREE with Super Saver Shipping.
You Save: $29.96 (43%) 
Product Features * Battery charger; charges AA and AAA batteries simultaneously
* Comes with 4 AA and 4 AAA rechargeable batteries
* 4 separate LCD displays; 4 modes; heat monitor prevents overcharging
* Also includes 4 C- and 4 D-size battery adapters and durable travel bag
* Measures 5.1 by 3 by 1.5 inches; Colors May Vary
Product DescriptionAll modes automatically default to 200 mA charge;Charge both AA and AAA rechargeable batteries simultaneously;Overheat detection to protect over-charging.
Product Details# Product Dimensions: 1.5 x 5.1 x 3 inches ; 2 pounds
# Shipping Weight: 2 pounds
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Review La Crosse Technology BC-9009 AlphaPower Battery Charger
The La Crosse BC-900 is an intelligent battery charger for 1 to 4 AA or AAA batteries at a time. Each channel is independant of the others, and you can mix battery sizes and functions in each channel independantly.
The charger has 4 modes. Charging mode is the default, but it also has a discharge mode, test mode (discharges, then charges back up again, and shows capacity of the battery), or refresh mode (repeats the test mode up to 20 times, until it doesnt see an improvement in the test result).
Each charging channel has an LCD readout that can show the charging current, the voltage of the cell, the capacity of the cell (in ma if under 2.0 amps, or in amps if it is a 2000ma cell or higher) in test or recharge mode, or the time it has been performing the function it is currently doing.
The pleasant surprise was to find out all the freebies that come with the charger: four AA and four AAA batteries to get you started, four C-cell adapters, four D-cell adapters, and a nifty carrying case.
Most of the chargers you can find on the market today use one or the other of these methods. The fast chargers, especially the cheap ones, excel at one thing: destroying perfectly good batteries, because they lack the monitoring circuitry to control the charge current and detect when the battery is full. The slow chargers are usually better, mainly because it's harder to design a really bad slow charger.
Charging Ni-MH batteries is the result of a compromise. A low current is gentle on the battery and maximizes its lifespan, but a full charge takes hours.
A high current will recharge the battery much faster, but put more strain on it, causing it to wear out prematurely. It also requires careful monitoring of the battery's electrical characteristics to prevent damage.
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