Batteries for Rapido light boards

[OldEastRR]

... Are the LR41 type, except modern small disc batteries don't seem to use that designation any more. Or the big battery companies have given their own numbers propriatory to them. trying to get equivalents info on theinternet fails because nobody translates what an LR41 is called by Energizer, Duracell, or anybody -- no cross-reference at all. Why do they do things like this? I assume this type is still made.

[MK]

https://www.google.com/search?q=lr41+battery+equivalent

[eja]

Good to know --- thx

[mmagliaro]

Realize the SR41, which is silver oxide, will last quite a bit longer than the LR41, and it
will maintain nearly the same voltage up until it "drops off a cliff" and goes dead, while the LR41 gradually fades.
I did some modifications to these boards in an old thread, where I changed the LEDs and changed the dropping resistor.  Using LR41's
on the modified board, I got 22 hrs of battery life, and with SR41's, I got 32 hrs.   I even tried SR45's ij modified batter holders,
which are physically thicker, but will fit on the board.  They supposedly have 50% more mAh than an SR41, but disappointingly,
they didn't seem to hold up any longer than the SR41 before the LEDs dimmed enough to require a battery change.