Can I use 3rd party charger to charge my batteries?

Discussion in 'The Projects Forum' started by dp31959, Jun 18, 2012.

  1. dp31959

    Thread Starter New Member

    Jun 18, 2012
    I would like to know if I can use this 3rd party charger to charge my skil batteries.

    My goal is to have a charger that I can just put the batteries in and forget about them until the next time I need them and then grab them out of the charger and have them ready to go.

    The problem I have with the manufacture’s charger is that there is no automatic shut off or protection from trying to charge a bad battery. When you charge the battery for to long or try and charge a bad battery the manufacture’s charger burns out the charger’s transformer

    I can disassemble the manufacture’s charger for the batteries and easily remove all of the guts. Then could I just wire the ends of the 3rd party charger (Alpha charger) to the ends of the manufacture’s charger?

    What do you think? Will this work?

    The battery is a skil 92940 Flexcharge battery 3.6-Volt 1.0-Amp Hour Nicad.

    The charger is an Alpha Power Battery Charger with the Specs:
    • 3 Easy Steps to Renewable Power
    1. Insert battery (batteries)
    2. Select Mode: Charge,Discharge/charge,Refresh/charge, Test/charge
    3. Select Rate: 200mAh,500mAh, or 700mAh
    • Works with all NiCd & NiMH AA/AAA Rechargeable Batteries
    • Automatically switches to trickle charge when charging is complete to ensure maximum battery capacity
    • Automatically defaults to 200mA charge (the optimal setting for prolonging battery life)
    • Overheat detection to protect over-charging
    • Charges AA & AAA rechargeable batteries simultaneously
    • Will not charge defective batteries
    • Select different charging current for each channel
    • Charges Battery Types: AA/AAA NiCd and NiMH
    • Input Voltage for AC/DC Adapter: 100-240 VAC (works only with included AC/DC Adapter)
    • Charging Current Range: 200 mAh, 500mAh, or 700mAh
    • Max Charging Capacity: 3000 mAh
    • When charging is complete, LCD shows capacity in mAh for each battery
  2. #12


    Nov 30, 2010
    Big problem: Nobody in his right mind would endorse an off-brand product without tearing it apart and knowing every part inside it and everything it does.

    Next problem: That charger will not charge a 3.6 volt battery. It's for AAA and AA batteries only.

    Next customer.
  3. bountyhunter

    Well-Known Member

    Sep 7, 2009
    For a Nicad, you can just use a constant trickle charger at about c/10 which is 100 mA in ths case. You don't need a complicated charger.
  4. wayneh


    Sep 9, 2010
    All true, but I think the OP would prefer a set-it-and-forget-it solution, a smart charger. If he has the luxury of not needing a fast bulk charge followed by a smart switch to trickle, then a constant trickle charger would be a great solution. Better for the batteries, actually.
  5. sohag513

    New Member

    Jun 26, 2012
    here i suggest you to use mobile charger. but remember, this way you have to charge 3 batteries by connecting them series. i recommend you to use NOKIA brand. You can try this circuit diagram.