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    timd157's Avatar
    timd157 Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Jul 13, 2007, 08:36 AM
    Rechargeable batteries
    I have a Racal Dust filter mask I use in my woodturning. It is a simple motor in a mask that blows a stream of fresh air through a filter. The product is no longer made but is still very serviceable but the rechargeable battery pack needs replacing.
    The only information I have is as follows:
    Racal product. Charger Input 240v 50 Hz Output 4.2v 230mA .96VA
    The battery pack contains 3 X 5/4 Nicad rechargeable batteries of a size no longer obtainable ( my local branch Maplin's has searched for me) and it ran for 4 hrs.

    There was an 8 hour offboard rechargeable battery pack available once, which had 3X 1/2D Nicad cells.

    I want to make an 8 hour rechargeable battery pack connected by a lead to the mask which contains the motor. The connections are not a problem, I can change them as needed. Can I use the same charger?

    Hope you can help. My local Maplins said they thought they could but were too busy when I went there
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
    Uber Member
    		  
    #2

    Jul 14, 2007, 01:12 PM
    Sounds like motor 3.6 volts(3 [email protected] volts) Maybe you could outboard you own
    3.6 volt battery. Would have extended usage. Can be as big a battery pack as you want, just not more than 3.6 volts, Then make sure charger has capacity of any increased size of battery pack.

    Would something like this work:
    Sharp CL250 3.6 Volt NiCad Cordless Phone Battery at Lowcostbatteries.com
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