rechargeable 28L battery

I've been searching for a couple days for a rechargeable 28L type ( 6V./ dog collar style) battery. The only type found is lithium, but not rechargeable. Since I use this often, the Lithium cells gets expensive, and I want to conserve waste and cost. Does anyone know if they even make this cell type in Ni-MH or other rechargeable chemisty ?? Thanks

Les

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les
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Don't know what a 28L is presumably a watch hearing aid if it goes on a dog collar?

I have this old Radio Shaft clock that takes (and promptly eats) 9 V "standby" batteries.

I found two sources of mini rechargeable batteries for it. All Electronics has a surplus 2.4 V 15 mah packs 0.93" X 0.54" X 0.15"

Their part number is NMH-15

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$1.25 each pack (two cells in shrink tube served with wires and a connector)

I wired three in series and use a 10K resistor to trickle charge them from the internal 10 V supply. Fits the 9V compartment with room to spare.

Electronic Goldmine has similar packs.

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I wish it were a standard battery, but you know, engineers sometimes pick the oddest batteries in their designs.

It's a small 6V battery, ALMOST like an "N" sized battery. However, it's lithium, and it's for a dog collar. On standby this sucks energy like crazy. That's why I'm trying to economize on the waste. I haven't seen anything but lithium so far. I hope someone out there has seen something otherwise.....

Les

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les

I don't know that I buy that last. Seems to me some of the crap I see looks like it was designed by an interior decorator or female real estate sales agent.

My microwave is a prime example of that - the display is recessed from the window so I have to bend to see it, the light stays on with the door open, close the door and condensate obscures the display, none of the function keys is arranged logically except the numerical keypad, they add a lot of features that have to be reprogrammed each time the power fails, the beeper goes off and through an entire cycle in spite of opening the door or pressing keys, (who needs a beeper when the thing sounds like a 747?) Why can't they put a back up cap/battery in the clock?

The engineering seems pretty good - otherwise - heats food fast.

Needless to say, I've already "moded" the MW

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