Mk.558
Well-known member
This could apply to any of the Duos but I will be specifically concerned with the 2300 so that's what I shall discuss.
I will need to replace the internal batteries on two battery packs, so I will probably take pictures and provide useful information, and also ask before I do it for any pointers.
First I had to look up what kind of battery it was. The 2300 uses a ...let's search, shall we? the answer is elusive.
Anything here? No, that is for Type I batteries. But there's a link -- and it's dead. The WayBack Machine has it though, albeit with a few pictures missing. Here's one image that somehow managed to barely slip through:
http://web.archive.org/web/20041206083657/http://www.fastlight.demon.co.uk/jg/duo1.jpg (give it a second to load)
Okay. None of those links tell me what kind of battery it is, and the last Duo battery guide was for Type II cells, not Type III. But it does say "4/5 A" size cells.
I figured they'd be 18650s, but this link says they are not. "4/5 AF size NiMH cells" just so happen to be close to "4/3" 18650s according to Google. Is it a typo? And what's the original capacity? No idea. Obviously for a replacement we like to crank up the capacity because more mAh equals more runtime. But the internal battery circuitry won't properly display the remaining percentage because it's likely that in 1995 they didn't have 18650s with as high mAh as they do today. Or 4/5 AF size NiMHs.
Or do they? 2000 mAh. Sure they're not these? 4200 mAh for the win. If that's the size.
I'll come back on this later once the Duo is in my hands and the batteries undergo heart surgery under the hands of an untrained...chemist.
I will need to replace the internal batteries on two battery packs, so I will probably take pictures and provide useful information, and also ask before I do it for any pointers.
First I had to look up what kind of battery it was. The 2300 uses a ...let's search, shall we? the answer is elusive.
Anything here? No, that is for Type I batteries. But there's a link -- and it's dead. The WayBack Machine has it though, albeit with a few pictures missing. Here's one image that somehow managed to barely slip through:
http://web.archive.org/web/20041206083657/http://www.fastlight.demon.co.uk/jg/duo1.jpg (give it a second to load)
Okay. None of those links tell me what kind of battery it is, and the last Duo battery guide was for Type II cells, not Type III. But it does say "4/5 A" size cells.
I figured they'd be 18650s, but this link says they are not. "4/5 AF size NiMH cells" just so happen to be close to "4/3" 18650s according to Google. Is it a typo? And what's the original capacity? No idea. Obviously for a replacement we like to crank up the capacity because more mAh equals more runtime. But the internal battery circuitry won't properly display the remaining percentage because it's likely that in 1995 they didn't have 18650s with as high mAh as they do today. Or 4/5 AF size NiMHs.
Or do they? 2000 mAh. Sure they're not these? 4200 mAh for the win. If that's the size.
I'll come back on this later once the Duo is in my hands and the batteries undergo heart surgery under the hands of an untrained...chemist.