I run my M102 off a 6v lantern battery at home. Since I do most of my programming / use while sitting in the living room watching TV where there is no convenient wall socket. The battery sits on the floor under the end table.
When on the go, I use the Energizer AA lithium batteries, which give about 3-4 times the run time compared to alkalines, so the extra expense is more than covered. Or if I have the whole laptop case with me, I use a 4 D cell holder or the AC adapter if I am near a wall outlet. The other thing that works is a USB "Power Bank". Just modify a standard USB "A" to "whatever" cable, cut the "whatever" end off and solder on an appropriate "power barrel" connector (5.5mm O.D. x 2.1mm I.D.) observing proper polarity (minus on the tip). The wires in the cable are usually "RED (+)" and "BLACK (-)" but check before soldering on the connector. These can be quite small and portable and are easily rechargeable. Regards, PeterN ------------------------------- > > Message: 3 > Date: Thu, 3 Jul 2025 10:03:32 -0700 > From: Erik Keever <[email protected]> > To: [email protected] > Subject: [M100] M100 power supply > Message-ID: > < > cadkoxhley5wddmyozrszvjdofungbhgwov3nxxxcevf_kfo...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > Hi folks, > > I'm sort of curious, in the modern era the M100's use of 1.5V alkalines is > somewhat of a wasteful habit and they are slowly becoming less available > than they used to be as everything goes LiIon. > > Lithium batteries with builtin 1.5V regulators are nice for sure, but given > that its switching converter is apparently known for not being the most > reliable part of it (and seeing as it's driven by a discrete darlington, is > probably not exactly the most efficient power circuit ever designed > either), has anyone ever engineered a replacement with a modern 2-output > POL regulator that would take 4 stacked lithiums as input? > > -- Erik > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.bitchin100.com/private.cgi/m100-bitchin100.com/attachments/20250703/ef5f81c1/attachment-0001.htm > > > > >
