<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div dir="ltr"><meta http-equiv="content-type" content="text/html; charset=utf-8"><div dir="ltr"><meta http-equiv="content-type" content="text/html; charset=utf-8">Not sure if still possible but I was able to find a company selling replacement nicads that looked like they matched the spec of my cheetah MS6 back in 2016… didn’t want to remove the charging system: </div><div dir="ltr"><br></div><div dir="ltr">This is from my receipt:</div><div dir="ltr"><br></div><div dir="ltr"><span style="-webkit-text-size-adjust: auto; caret-color: rgb(191, 191, 191); color: rgb(191, 191, 191); font-family: arial, helvetica, sans-serif; font-size: 12px; background-color: rgb(255, 255, 255);">3.6V 110MAH NICD</span><br style="-webkit-text-size-adjust: auto; caret-color: rgb(191, 191, 191); color: rgb(191, 191, 191); font-family: arial, helvetica, sans-serif; font-size: 12px;"><span style="-webkit-text-size-adjust: auto; caret-color: rgb(191, 191, 191); color: rgb(191, 191, 191); font-family: arial, helvetica, sans-serif; font-size: 12px; background-color: rgb(255, 255, 255);">Item# NIC0010</span></div><div dir="ltr"><a href="https://interstatebatteries.com/">https://interstatebatteries.com/</a></div><div dir="ltr"><br><div dir="ltr">Worked for me.</div><div id="AppleMailSignature" dir="ltr"><br></div><div id="AppleMailSignature" dir="ltr">Joel</div><div id="AppleMailSignature" dir="ltr"><br></div><div id="AppleMailSignature" dir="ltr">Sent from my iPhone </div><div dir="ltr"><br><blockquote type="cite">On Jun 3, 2021, at 8:10 AM, Mike Bryant <mbryant@futurehorizons.com> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><span>I've always dropped in NiMH into NiCad slots okay. But that's no guarantee. As you say not getting rid of the old one is a far worse scenario.</span><br><span></span><br><span>-----Original Message-----</span><br><span>From: Synth-diy [mailto:synth-diy-bounces@synth-diy.org] On Behalf Of Richie Burnett</span><br><span>Sent: 03 June 2021 15:30</span><br><span>To: synth-diy mailing list</span><br><span>Subject: [sdiy] Cheetah MS800 replacing NiCd Varta Mempac</span><br><span></span><br><span>Hi all,</span><br><span></span><br><span>I'm currently servicing a Cheetah MS800 digital wavetable synth and want to change the old NiCd Varta Mempac to a brand new NiMH Varta Mempac before putting it up for sale.</span><br><span></span><br><span>The old blue NiCd battery hasn't started to leak yet, and is still holding it's charge but I know that old NiCd Mempacs are regarded as a ticking time-bomb in equipment of this age (>.<) I wouldn't feel comfortable selling it without addressing this issue first.</span><br><span></span><br><span>The existing 100mA 3.6V NiCd trickle charges from the 5V supply rail through a 1k resistor when the unit is powered up. Should I be looking at changing this trickle charge current when changing the battery type to the 150mA 3.6V NiMH replacement?</span><br><span></span><br><span>I did a search online and found very little solid information about this. </span><br><span>Everything from "The NiMH Mempacs are a drop in replacement" to "you need to decrease the trickle charge current because NiMH is less tolerant of being overcharged" The trickle charge current already seems low to me.</span><br><span></span><br><span>I would be interested to hear your thoughts!</span><br><span></span><br><span>-Richie, </span><br><span></span><br><span></span><br><span>--</span><br><span>This email has been checked for viruses by AVG.</span><br><span>https://www.avg.com</span><br><span></span><br><span>_______________________________________________</span><br><span>Synth-diy mailing list</span><br><span>Synth-diy@synth-diy.org</span><br><span>http://synth-diy.org/mailman/listinfo/synth-diy</span><br><span>Selling or trading? Use marketplace@synth-diy.org</span><br><span></span><br><span></span><br><span>_______________________________________________</span><br><span>Synth-diy mailing list</span><br><span>Synth-diy@synth-diy.org</span><br><span>http://synth-diy.org/mailman/listinfo/synth-diy</span><br><span>Selling or trading? Use marketplace@synth-diy.org</span><br></div></blockquote></div></div></body></html>