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Thread: Konnoc KCR-A099 AA/AAA charger

  1. #1
    Join Date
    Dec 2008
    Arctic Circle

    Default Konnoc KCR-A099 AA/AAA charger


    I would like to hear user opinions about this charger.
    23$/17€ price is kinda tempting and it comes with car/usb kit, and 4pcs 2500mAh AA nimh included.
    Last edited by Egsise; 01-27-2009 at 03:46 PM. Reason: typo

  2. #2
    Join Date
    Dec 2008
    Arctic Circle

    Default Re: Konnoc KCR-A099 AA/AAA charger

    The Konnoc KCR-A099 seems a lot like Sony BCG-34HRM or Soshine SC-C3.
    I opened my KCR-A099 and the circuit board is not the same, so these are three different designs.
    Soshine and Konnoc circuit boards have "Shenzen" on them, referring to Shenzhen Konnoc Charger Industrial Co.

    UnknownVT has done some testing with the Soshine SC-03, it can be found in here.
    The results and the functions are very similar to those what I get from testing the KCR-A099.

    Heres some info about the KCR-A099.

    * Suitable for NI-MH/NI-CD 1-4pcs AA/AAA battery
    * Refresh function
    * -¦¤V control with auto power cut-off function
    * Individual safety timer
    * Over-heat & Over-charge protection
    * Detection of non-rechargeable cell
    * Will not start charging process if +/- polarity is reversed
    * When charging, different batteries can be mixed either in sizes or in capacities
    * Able to charge a single cell
    * Individual LCD displays charging status
    * Available accessories: Car kit & USB connector
    * Stable, accurate, efficient and safe

    Technical Parameters:

    Input:100-240V AC 50/60Hz 10W/12V DC 1.0A 10W (Car kit)/ 5V DC 500mA 2.5W (USB)
    Output:1.2V DC 1000mA AA/AAA size
    Trickle current:50mA
    Discharging current:350mA

    Product Specifications and test methology of Konnoc KCR-A099 1 Hour LCD charger

    Prepared by Grant David of Konnoc.

    1 Product Features

    1.1 Application Range
    Suitable for 1~4 pieces of AA / AAA Ni-Cd or Ni-MH batteries

    1.2 Microprocessor Controlled
    1.2.1 –Delta v cut off
    The charger stops charging once the microprocessor detects the batteries are fully charged.

    1.2.2 Timer Protection
    For safety use, charging termination is also controlled by timer.

    1.2.3 Defective and Non-rechargeable battery detection
    Safety Protection for using the charger if you attempt to charge defective or non-rechargeable batteries, If you charge non-rechargeable and rechargeable together, detection may not work properly.
    Charging rechargeable alkaline batteries may result in battery leakage.

    1.3 Other protections
    1.3.1 Reverse Polarity Protection
    Protects the charger and batteries against incorrectly installing batteries.

    1.3.2 Over Current Protection
    Maintains constant charging current during the charging cycle.

    1.3.3 Over Temperature Protection
    Protects the batteries from being damaged by overheating, the charging will automatically terminate when the temperature of charger or battery reach to 65oC + 5oC.

    1.4 Low Battery Leakage Current
    If the battery charger is not connected to AC power and the batteries are left in the charger, the charger will discharge the batteries in a certain amount of current.

    1.5 Trickle Charge After Full Charge
    After batteries are fully charged, there will still be a small pulse charge current applying to batteries.

    1.6 Refresh function
    The charger has the pre-discharge function, when the battery is discharged to 1.0V, the charger can automatically switch to charging status to charge the battery.

    1.7 Individual LCD display the Charging process
    The grid of battery figures rolling in charge status indicates the battery is CHARGING correspondingly. If the battery has been charged for 50% nominal capacity, the first grid will stop rolling; If been charged for 75% nominal capacity, the second grid will also stop rolling; and If been fully charged , the third grid will stop rolling and display full power and end charging.
    If you need to pre-discharge the battery, switch to discharge status, the LCD will display the battery is in refresh process, after the battery discharge to 1.0V, the charger can automatic switch to charging.

    1.8 LED Indicator
    LED ON indicates the charger has been connected correctly.
    LED Flashing indicates WARNING of
    ※Defective batteries
    ※Short circuit
    ※Non-rechargeable batteries

    2 Electrical Performance and Technical Parameter

    2.1 Input
    100~240V AC 50/60Hz 10W

    2.2 Charging Currents

    2.3 Charging Voltages
    1.4V DC For individual charge

    2.4 Battery Leakage Current
    Maximum 0.5mA

    2.5 High-Voltage Shock Test
    Method: Connecting high voltages 3000VAC for 1 minute between input and output terminals.
    Requirement: Current leakage between input/output must be less than 10mA, and the unit should still work as normal.

    3 Mechanical Tests and Requirements

    3.1 Drop test
    Drop from 3 feet height onto an oak board of 10 mm thick. The test shall be carried out 3 times respectively in 3 different surfaces of the case.
    Requirement: The charger should still meet High-Voltage Shock Test.

    3.2 Bending test (Electrical cord)
    Loading: The plug and S/R should withstand weight of 200 gram.
    Cycles: Swing 120o left to right for1000 cycles.
    Speed: 20 cycles/min.
    Expected result: The cord should still be conductible.

    3.3 Surface
    Damage and rusting are not permitted.

    4 Environmental Conditions

    4.1 Operating Temperature
    0 degrees celsius to 40 degrees celsius, best at 25±2 degrees celsius

    4.2 Storage Temperature
    -20 degrees celsius to 60 degrees celsius, best at 25±5 degrees celsius

    4.3 Normal operation humidity range
    Below 85%R.H., non-condensing

    5 Safety Standards
    CE Approval

    6 Product Inspections
    6.1 Inspections to 100% of products
    -Charging voltages
    -Charging current
    -LED indicators
    -LCD display
    -Foreign mass & sound by shock
    -Polarity of charging channel
    ※Charging AA or AAA at least once at 25±3℃.

    6.2 Inspections to part of products
    -Over current protection
    -Over temperature protection
    -Drop test
    Last edited by Egsise; 01-27-2009 at 03:47 PM. Reason: typo

  3. #3
    Join Date
    Dec 2008
    Arctic Circle

    Default Re: Konnoc KCR-A099 AA/AAA charger

    LCD display towards me, slot 1 is the one in the far left and right next is no 2 and so on.

    -Slot 1, refresh function does not work quite as it should be, sometimes it discharges only to ~1.18V
    -Slot 2, refresh function does not work quite as it should be, sometimes it discharges only to ~1.05V
    -Slot 3, refresh function discharges to 1.01V
    -Slot 4, refresh function discharges to 0.99V

    Refresh function for 4 cells builds heat, and the slots 1&2 are not reliable so i use only slots 3&4 when i want to use refresh.

    1-4pcs ~2000mAh cells charging time is about 3,5 hours and the cells get quite warm.

    The 2500mAh Konnoc cells have only ~2000mAh, not 2500mAh as package says.

    12V car adapter, and USB adapter work.(included in the package)

    Konnoc KCR-A099 is my backup and travel charger, it also charges old and weared cells that Sanyo MQH02 refuses to charge.
    Last edited by Egsise; 08-17-2009 at 03:10 AM.

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