Vlad's Gadgets

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Mini USB 2.0 SDHC SD/MMC Card Reader Review

This small USB card reader lets you use any SDHC card or MMC card as a USB drive on your PC. I got this from DealExtreme, and the best thing…

Mini USB 2.0 SDHC SD/MMC Card Reader Review
Logitech Z4 Stereo Speaker System

If you want good stereo speakers under $100, the Logitech Z4 is an excellent choice. It's a 2.1 stereo speaker system consisting of two satellite speakers and a subwoofer, providing…

Logitech Z4 Stereo Speaker System
Bosch IXO 3.6V Cordless Screwdriver

The Bosch IXO Cordless Screwdriver is a portable motorised electric screwdriver. It is shaped like a cute little mini-raygun from a 1950's sci-fi movie and is very comfortable to hold…

Bosch IXO 3.6V Cordless Screwdriver
Portable UV Sterilizer Wand Disinfects Computer Keyboards and Phone Keypads

The Portable UV Sterilizer makes it easy to kill germs on surfaces that cannot easily be washed, such as computer keyboards and telephone keypads. It works by generating UV-C light…

Portable UV Sterilizer Wand Disinfects Computer Keyboards and Phone Keypads
WKB-1000 Wireless Ergonomic Keyboard With TouchPad

The WKB-1000 is a combined wireless keyboard and touch pad oriented towards Media Centre/Entertainment/Home Theatre PCs. It is light and slim, weighing 540g (1.2lbs) and measuring 422x180x19mm (16.6x7.1x0.75 inches). It…

WKB-1000 Wireless Ergonomic Keyboard With TouchPad
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12 Channel Smart AA, AAA and 9V Battery Charger with Discharge Function

Written by Vlad on March 19, 2011 – 10:12 pm - 3,731 views

Smart battery charger with discharge function, loaded with 8 AA NiMH batteries

This is a microprocessor-controlled battery charger that can charge up to 10 x AA/AAA batteries and 2 x 9V batteries. It supports both NiCad (Nickel-Cadmium) and NiMH (Nickel-Metal Hydride) simultaneously. Each battery is independently monitored and charged, and a multi-colour LED above each battery indicates the charging status.

There is a discharge function that drains all the batteries completely before commencing a charging cycle, which is useful for rectifying “memory effects” and other common battery problems. It employs several mechanisms to ensure that batteries are completely charged, but not overcharged.

It comes with both a 12V DC power adapter that operates worldwide on mains voltages between 100-240V as well as a lead that plugs into a car cigarette lighter socket so you can charge batteries when you’re on the road.

I purchased this from Jaycar electronics, who call it 12VDC & 240VAC Smart Battery Charger Ni-Cd & Ni-MH. I have seen similar smart chargers on eBay, but most are 10-channel chargers with support for only AA and AAA batteries.

Why I bought the Smart AA & AAA battery charger

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