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I have two batteries for my MP240 and when one is off less than 40% I take it off and putthe other one which is always charged. This morning I have changed the battery no 2 which was supposed to be charged (and anyway it was not completely depleted) and there is no juice at all. The other battery works fine. Any insight about this problem ? hasve you ever experienced sudden death on M240 batteries ? Any remedy to recover the battery ?

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I have two batteries for my MP240 and when one is off less than 40% I take it off and putthe other one which is always charged. This morning I have changed the battery no 2 which was supposed to be charged (and anyway it was not completely depleted) and there is no juice at all. The other battery works fine. Any insight about this problem ? hasve you ever experienced sudden death on M240 batteries ? Any remedy to recover the battery ?

Yes.

It was replaced by the dealer.

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One of the batteries for my M262 died a sudden death and would not charge. I called Leica NJ and was told the battery was still under warranty. I mailed the battery back to Leica Customer Care with a copy of the receipt for the camera and extra battery. They replaced it with a brand new battery. Problem solved. Big thanks to Leica Customer Care.

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  • 1 year later...

I've had my M240 since Feb. 2014 and bought two extra batteries for it at that time, for a total of three in regular rotation. Back in early 2019 one of those suddenly died - the camera wouldn't even turn on and putting that battery in the Leica M240 charger would show the normal charging process for sub-80% charge (only green blinking LED). At some point after a couple hours, both the green and orange LEDs would blink rapidly, indicating a charge malfunction. Putting that battery back in the camera showed absolutely no power. Given the nearly 5 years of use, I chalked it up to a natural death.

In Feb. 2019 while in Munich, I bought two more batteries from the Leica Store there (better price too, than in the Americas). All was well with those for about 1-2 months when one of 'suddenly' died. It had a full charge but wouldn't turn on the camera. I put it on the Leica charger a few times and it would go through the same progression as the previously defective one, ultimately always showing no charge in the camera. I put it on the charger again and it 'miraculously' showed solid green and orange LEDs to indicate full charge, and also worked in the camera. I have no idea if I did something differently to recover it, but it has since continued to work. Shortly thereafter, the second new battery also stopped working. Unfortunately with that one, no matter how many times I put it on the Leica charger, it won't recover. I also bought the Nitecore charger and it too always shows the battery to be toast (EE EE on the display). 

I've since been in contact with Leica NJ and they will replace the one that won't recover. 

So far I've been using the Nitecore charger and it has worked. It's convenient to be able to charge from USB and is very compact, which I wish more of the camera manufacturers would emulate (make chargers as small as possible while retaining reliability).

My 2¢. Hopefully it's helpful to others with M240 battery woes.

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I was very pleasantly surprised-- have 2 batteries for my M240 (each ca. 6 yrs old) and could never get more than 60% charge in the past year or so.  I followed advice here and started recording video with lens cap and let it run until nearly dead.  Then I fully recharged (using Leica charger-- not the Nitecore I have as well). and voila-- BOTH batteries are now showing 100%.  I don't know if they have a greater charge or they simply illustrate 100% when I hit the set button on M240, but if they have taken a full charge, hallelujah !

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  • 2 months later...
On 6/6/2019 at 1:12 PM, hockey44 said:

 I followed advice here and started recording video with lens cap and let it run until nearly dead.

I've tried searching this and come up with nothing. I don't know where to look. Could you please link the thread in a reply?

Thanks.

Greg

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  • 1 year later...

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On 6/6/2019 at 10:25, rscheffler said:

Tengo mi M240 desde febrero de 2014 y compré dos baterías adicionales para él en ese momento, para un total de tres en rotación regular. A principios de 2019, uno de ellos murió repentinamente: la cámara ni siquiera se enciende y al colocar esa batería en el cargador Leica M240 se muestra el proceso de carga normal para una carga inferior al 80% (solo el LED verde parpadeante). En algún momento, después de un par de horas, los LED verde y naranja parpadearían rápidamente, lo que indica un mal funcionamiento de la carga. Poner esa batería en la cámara no mostró absolutamente nada de energía. Dados los casi 5 años de uso, lo atribuí a una muerte natural.

En febrero de 2019, mientras estaba en Múnich, compré dos baterías más en la tienda Leica allí (también mejor precio que en América). Todo estuvo bien con aquellos durante aproximadamente 1-2 meses cuando uno de 'repentinamente' murió. Tenía una carga completa pero no enciende la cámara. Lo puse en el cargador Leica unas cuantas veces y pasaría por la misma progresión que el previamente defectuoso, al final siempre sin mostrar carga en la cámara. Lo puse en el cargador nuevamente y 'milagrosamente' mostró LED verde y naranja sólidos para indicar la carga completa, y también funcionó en la cámara. No tengo idea de si hice algo diferente para recuperarlo, pero desde entonces ha seguido funcionando. Poco después, la segunda batería nueva también dejó de funcionar. Desafortunadamente, con ese, no importa cuántas veces lo coloque en el cargador Leica, no se recuperará. 

Desde entonces he estado en contacto con Leica NJ y reemplazarán al que no se recuperará. 

Hasta ahora he estado usando el cargador Nitecore y ha funcionado. Es conveniente poder cargar desde USB y es muy compacto, lo que desearía que emularan más de los fabricantes de cámaras (hacer los cargadores lo más pequeños posible sin perder confiabilidad).

Mi 2 ¢. Con suerte, es útil para otras personas con problemas con la batería del M240.

moisture in the circuit, save the batteries for the future lithium can serve. to repair another

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  • 6 months later...
On 9/1/2019 at 10:59 AM, grick said:

I've tried searching this and come up with nothing. I don't know where to look. Could you please link the thread in a reply?

Thanks.

Greg

May be a late answer, but try this thread:

 

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I bought a new notebook recently, it has a battery saving feature that only charge the battery to 80%.  However, the M battery charger also has a 80% indicator.  So I guess 80% full will last the battery longer. 

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On 3/10/2022 at 2:38 PM, jaeger said:

I bought a new notebook recently, it has a battery saving feature that only charge the battery to 80%.  However, the M battery charger also has a 80% indicator.  So I guess 80% full will last the battery longer. 

Yes, that's correct. Lithium Ion batteries don't like to be fully charged and don't like to be fully discharged. Every time you charge or discharge a battery you reduce it's lifetime. There are only so many charge/discharge cycles that you can do to a LiB battery. If you charge too much or discharge too deeply you accelerate the degradation.

It is very likely that the 100% indicator of the charger isn't really 100% of the full capacity of the battery. Similarly, when the camera indicates 0% the battery is definitely not at 0% state of charge.  

This is totally different to a lead-acid battery (like the ones we all have in our gasoline powered cars). Lead Acid batteries want to be fully charged at all times. 

I have no idea why some of you can recover 'dead' LiBs by 'fully' discharging them. Usually the problem is the opposite: how to recover a cell that was damaged by deep discharge...

https://www.researchgate.net/figure/Voltage-levels-before-and-after-each-regeneration-sequence-of-deeply-discharged-cell_tbl2_346044288

Obviously if worked for some of you, who am I to argue with that?

 

 

 

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There seem to be various experiences with these batteries. Mine is that, shortly after I bought my M240 in 2013, I couldn’t get the battery to charge up to 80% so I contacted Leica and they swapped my charger for a new one which charges the battery to 100%. At the same time I bought a second battery as a spare. Since then, for more than eight years, I charge both batteries to 100% every time and have had no problems with them. All this talk of not charging over 80% has me wondering if I have shortened the life of the batteries BUT if so by how much. Because over eight years seems pretty good anyway.

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