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No experience with the M10, but I have bought several used sets, and some included third party batteries. They were never very good (lasting long).  My main use for them is as a spare battery for when my native one is empty. Certainly if you have only one native battery it is worth it to have one. I can shoot at will with my good battery until it runs out completely. Then I switch to the spare and go into battery saving modus, taking only the shots I really must have before I can recharge my main battery again.

Edited by dpitt
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Leica suppresses the ability to make aftermarket BP-SCL5 batteries by putting "smarts" in the batteries themselves. M10 camera bodies communicate electronically with batteries in addition to drawing power from them. A battery that provides power but lacks the communication ability will cause the M10 firmware to power down the camera.

 

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I used third party batteries on all my cameras in the past, without any problem. Some would last less long after a few years, but no failure or swelling.

I understand there is still some risk that a third party battery causes some major issues to the camera, but there is also a strong drawback to Leica preventing third party options: what happens when Leica stops selling batteries for a given model ? Sure nothing is made to last forever, but I would hate to see a perfectly functional M body turned into a dead brick at some point for that reason alone.

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Is an interesting question. Batteries should last around 3-5 years depending on use. 

 

Will leica still sell them in 5-10 years? There are people still using m8/9s, though are off brand batteries being produced. 

 

I hope to be using my m10r/m in 5-10 years. 

Edited by Nimar
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19 minutes ago, TomB_tx said:

I hope I can still do anything in 5-10 years!

Not sure if that’s a reflection of age or general outlook, suspect the former as I imagine the average Leica M user is on the greyer side of the spectrum.

I got my first in my 20s (an m6 before they got expensive) and am still in my 30s (late) so would really hope to be using these cameras in 20 years but don’t know what technology will do in that time. 

Edited by Nimar
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9 hours ago, andyturk said:

Leica suppresses the ability to make aftermarket BP-SCL5 batteries by putting "smarts" in the batteries themselves. M10 camera bodies communicate electronically with batteries in addition to drawing power from them. A battery that provides power but lacks the communication ability will cause the M10 firmware to power down the camera.

 

Could you please share the source of your response above. I’m an avid reader of technical information and thought I’d processed all the public domain specifications pertaining to the M10 tech and would like to learn more about your response.

thankyou

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On 3/8/2023 at 7:06 PM, dugby said:

Could you please share the source of your response above. I’m an avid reader of technical information and thought I’d processed all the public domain specifications pertaining to the M10 tech and would like to learn more about your response.

thankyou

I don't know about causing the firmware to power a camera down, but the aftermarket M8/9 batteries are all kind of wonky in communicating with the camera or charger compared to the Leica battery. They work for the most part, but charge levels aren't reported accurately for most of them. I assume that the M240 and M10 batteries may have more proprietary circuitry making aftermarket batteries very difficult to make. The market for them is somewhat limited and may not be worth the ROI to make them.

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On 3/8/2023 at 4:06 PM, dugby said:

Could you please share the source of your response above. I’m an avid reader of technical information and thought I’d processed all the public domain specifications pertaining to the M10 tech and would like to learn more about your response.

thankyou

Sure. The following is an oscilloscope capture I made between pins 2 and 3 on the battery and my M10-M. I taped 30 guage wire to the contacts and inserted the battery into the camera so it would operate normally. The wires dangled outside where I could connect them to other equipment. This capture shows about 4 milliseconds of of a very small signal riding on top of the the battery voltage supplied to the camera. This short burst happens periodically, but there's a much longer burst when the camera first starts up.

I don't know what form of encoding is used, but it looks like a deliberate signal. There are people on the "Leica Photography" discord server that have done similar experiments and may know more about what information is being sent.

If I powered my camera with a lab supply at the same DC voltage (but without the signal on top), the behavior was that the camera turned on briefly and then quickly turned itself off.

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Thankyou for your explanation of a small signal riding on the battery voltage, which looks consistent with the circuit diagram from the "Anatomy M9/M8 battery" above thread showing the DS2438 wired to the   P+   DQ   P-   terminals.

The encoding would most likely be Maxim Integrated.

The forth terminal seems reserved for the Leica charger, as the camera only has 3 terminals connecting to the battery, ie the "CC - charger control"

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