Battery Up-Sizers Revisited!

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Gene

Flashlight Enthusiast
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Dec 19, 2000
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Dunsmuir, Ca.
I recently bought a few "Up-Sizers", (for lack of a better term and "stolen" from Ray!), from "this is nascar". When I received them, I couldn't believe how cheap they are and had no instructions, though they are not that hard to figure out. The plastic could be better and they "slip" together instead of having tabs that could lock them together. Size constraints, I would surmise, limit this.

I bought them because in my quest for D cell size rechargeables, the choice is either super high priced NiMH's or NiCD's, that are really an AA cell in a D cell body. I also wanted to use my stock of Powerex 2000 mAh NiMH AA cells.

I was also bummed, (to say the least), that they wouldn't work in my "boom box" and other devices. I finally pulled out the last mag-lite that I have, (a 4XD). I carefully put the "Up-Sizers" together using my Powerex AA cells as a "D" cell and put them in the straight tubed 4XD cell to see what worked and wouldn't. I tracked the culprits down to two "Up-Sizers" that had "flashing", (plastic that is left around the contacts during the molding process), and cleaned them up.

Guess what? They are a Godsend! Once I got them working, they work wonderful in my vintage Sanyo cassette "boom box" and other devices! The Powerex 2000 mAh cells seem to work as well as regular alkaline D cells and last as long! I've been playing cassette tapes, (yes, I'm old and also have over 300 albums on cassette tape! /ubbthreads/images/graemlins/grin.gif), and the radio for over two days and the Powerex 2000 mAh NiMH cells are still going strong!

One caution though, the AA to C cell "Up-Sizers" are too large and won't work in C cell applications. The best thing about these is they will work best "Up-Sizing" AAA cells to AA and AA cells to D size cells. As far as flashlights go, I wouldn't use them in anything other than AAA cells to AA and AA cells to D. /ubbthreads/images/graemlins/grin.gif
 
Very well written! We appreciate the information.

One thing to note is that C cells are the same length as AAs. A quick and simple AA to C adapter is to take 1/2" Sch. 40 PVC pipe/conduit and thinwall 3/4" PVC (sometimes called 200-series or class 200) and use a bit of foamm tape between the two to form a spacer. Now have an inexpensive AA to C adapter. Cut your pipes to whatever length you need (1x, 2x, 3x, etc.) and stack the cells inside. Depending on the application you may have contact issues with the tiny nipples on AAs, however. A little modifications and this design should work successfully.
 
Who would I have to contact to get some of those "Up-Sizers"? I'd like to try those on my mag-lite.
Thanks for any info!
 
Thanks JS and thanks for the info on the AA to C adapter! I'm going to have to try that out.

Skulk,
Try PMing "this is nascar" and see if he has any left.
 
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