I was going to use a 9V (PP3) for my project, but it won't fit in
the compartment. Instead, I'm going to pile 6 alkaline button cells
together and bind them with tape, to make a 9V that will fit.

What's a good way to make contact with a custom sized battery's
contacts? I assume it's inadvisable to solder to alkaline buttons
contacts? (I know Li cells are dangerous.)

FYI, my project needs to be completed today, in a short amount of
time, so I can't run around trying to round up pieces at stores,
etc., and need to rig something with things I've got already.

BTW, allowing for easy replacement of the battery would be nice, but
it's not at all a requirement.

I've got some ideas, but they're not great (e.g., wad up wire leads
and tape them tightly to battery contacts).

Thanks,
Jamie

I was going to use a 9V (PP3) for my project, but it won't fit in the
compartment. Instead, I'm going to pile 6 alkaline button cells
together and bind them with tape, to make a 9V that will fit.

What's a good way to make contact with a custom sized battery's
contacts? I assume it's inadvisable to solder to alkaline buttons
contacts? (I know Li cells are dangerous.)

FYI, my project needs to be completed today, in a short amount of time,
so I can't run around trying to round up pieces at stores, etc., and
need to rig something with things I've got already.

BTW, allowing for easy replacement of the battery would be nice, but
it's not at all a requirement.

I've got some ideas, but they're not great (e.g., wad up wire leads and
tape them tightly to battery contacts).

Thanks,
Jamie

What's a good way to make contact with a custom sized battery's
contacts? I assume it's inadvisable to solder to alkaline buttons
contacts? (I know Li cells are dangerous.)

"Jamie Jackson" <mySpa...@gmail.com> wrote in messagenews:1169750833.724602.299880@q2g2000cwa.googlegroups.com...

What's a good way to make contact with a custom sized battery's
contacts? I assume it's inadvisable to solder to alkaline buttons
contacts? (I know Li cells are dangerous.)Bare two lengths of hookup wire at the ends and shrink wrap to the battery.

I've soldered wires onto alkaline batteries for many years. Even though
the terminals may look clean, I always scrap the Ni Oxide off, use a
bit of sandpaper, and go for it. I always use safety glasses and low
temp solder.
The batteries do absorb a lot of the heat, so a little pencil type
soldering iron works poorly. I use a soldering gun. But if you go this
route, do be careful.

Li cells are indeed dangerous. Don't ever try to solder one of those.

Change of subject...

Alkaline cells and certain other types of "button" cells used in low
current devices such as garage door openers, TV clickers, etc. are
often thrown away and replaced when they are perfectly good. Always
check the voltage on these before deciding whether to trash them or
not. The terminals on these get a thin coating of Ni Oxide. You can't
see it... it's not like iron rust. Just rub the terminals with a bit
of sandpaper and in many (even most) instances the battery is as good
as new. I've got TV clickers that have the same batteries that came
with them over 8 years ago. It's usually just a matter of cleaning the
terminals. Ni Oxide looks like bright metal, so many people just throw
these batteries away without thinking.

On Jan 25, 1:47 pm, "Jamie Jackson" <mySpa...@gmail.com> wrote:

I was going to use a 9V (PP3) for my project, but it won't fit in the
compartment. Instead, I'm going to pile 6 alkaline button cells
together and bind them with tape, to make a 9V that will fit.

What's a good way to make contact with a custom sized battery's
contacts? I assume it's inadvisable to solder to alkaline buttons
contacts? (I know Li cells are dangerous.)

FYI, my project needs to be completed today, in a short amount of time,
so I can't run around trying to round up pieces at stores, etc., and
need to rig something with things I've got already.

BTW, allowing for easy replacement of the battery would be nice, but
it's not at all a requirement.

I've got some ideas, but they're not great (e.g., wad up wire leads and
tape them tightly to battery contacts).

Thanks,
Jamie

Just put them in a suitable plastic tube with a spring at one end
forming one contact and a contact plate at the other. I did this
trick with three 2032 coin cells. I used a plastic tube that once had
sweets in it. I made a flat spiral of copper wire that sat in the
bottom, and a short length of flat brass strip formed into a bow
across the cap. Cut the tube to length and press in the cap.
solder a wire to the brass strip first, because the plastic cap melts
very easily.