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here's the schematic for the easy-to-lose B&D 18volt charger.

so you can make one easily for 2$ instead of buying one.

<p>You say it costs $2. So where do we get the 25.6 VAC PSU for free ?</p>
<p>you can use a lower voltage one and a 1$ step-up converter found on ebay.</p><p>look around in thrift shop for an old powerpack.</p>
<p>Wow, so it is a super simple &quot;trickle charger&quot;</p><p>No wonder the batteries never last. Basically zero intelligence charge control.</p>
<p>actually a slow charge is better for most battery, the temperature is very important too.</p><p>sadly they are dumb charger so are very prone to overcharge.</p>
<p>Quite usual, I have Skil drills and the schematic is more complex but in the end its also a battery torture device. For that reason I use an other device to charge the drill batteries. </p>
<p>i included the battery cell #, but i haven't looked up the specs and since my drill still works i aint going to chop it up to know either.</p>
<p>dont be fooled by the wall wart that come with those, they are AC out but are marked DC on them.</p>

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