4 V gel cell for Tek 222PS scope

Hello all!

I am looking for a replacement battery for a Tektronix "Power Scout"

222PS portable scope. The original battery supplied by Tek consists of two Panasonic 4 V 2.2 Ah/20h gel cell batteries glued together and wired in series. The Tek label rates this combination at 8.0 V,
2.1 Ah/10h and gives the part number as 146-0075-00. (This same battery may have been used in the other portable scopes like this one, like maybe the 222/A and 224.)

The Panasonic part number for each battery is LC-2042R1PU . I can't find this number, but they are the same size, shape, and terminal configuration as the (discontinued) LCS-214P,

. (Tek welded some tabs onto the battery terminals to connect the wires to.) I have checked some of the usual suspects (Power Sonic, CSB, Yuasa/Enersys, and Sonnenschein) and none of them make exactly this battery. Power Sonic makes some 4 V batteries that are physically and electrically too big. They also make an 8 V 3.2 Ah battery that will almost fit in the hole except it's just a bit too long (the 5.3"/134 mm dimension).

If I can't find the right battery, I have other options. I sort of want to stay with lead-acid or with something that has a compatible charging requirement so I can keep using the charger built into the scope. If I can find a 12 V battery that fits in the hole, I can run it into the external power jack on the scope, but then I have to come up with a separate charger for the battery. Or, maybe I can stack up some NiCd, NiMH, or 2 V SLA cells to get there.

Any tips or leads will be appreciated. Thanks!

Matt Roberds