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In 2010 I had some problems with my replacement BLM-1 batteries for my Olympus E-30. Since then I kept a page recording the charge history of the batteries since October 2010. This page does the same thing for my newer cameras, the Olympus OM-D E-M1 Mark II that I got on 23 February 2017, and then the Olympus OM-D E-M1 that I got on 3 December 2013. And yes, this page violates my horror of reverse chronological data: the newer camera is not really related to the older one, so there's no order to consider. See the detail page for more information.

The status column has the following meanings:

I haven't had either of the last two status for these cameras, but I did for the E-30 batteries.

OM-D E-M1 Mark II

Battery       Date       Last       Count       Status       Comments
      started       image
1       23 February 2017       583       583       Charged
1       11 March 2017       1500       917       Charged       38% left
1       14 April 2017       2003       503       Charged       37% left
1       30 April 2017       2484       481       Charged       39% left
1             2981       497       Charged       32% left
1       13 May 2017       3537       556       Charged
1       23 May 2017       4175       638       Charged       34% left
1       15 June 2017       4689       514       Charged       37% left
1       Date may not include time       5298       611       Charged       29% left
1       21 July 2017       5954       656       Charged       37% left
1       7 August 2017       6761       807       Charged       22% (red)
2       26 August 2017       7449       688       Charged       18% (red)
1       18 September 2017       7985       536       Charged       18%?
2       4 October 2017       8691       706       Charged       red (< 20%?)
1       15 October 2017

OM-D E-M1 Mark I

When I got the Olympus OM-D E-M1, it was configured to reset the image count every day, which makes it really difficult to count the number of images taken. I fixed that on 10 December 2013 after taking 59 images. Thus the difference in the counts at the beginning.

Since getting the OM-D E-M1 Mark II, I use this camera less, so the batteries stay in longer. As observed elsewhere, this means that I get fewer photos from a charge.

Battery       Date       Last       Count       Status       Cumulative       Comments
      started       image                   count
1       4 December 2013       26       26       charged       26
1       6 December 2013       426       449       charged       449
2       17 December 2013                   charged             initial charge
3       17 December 2013                   charged             initial charge
4       17 December 2013                   charged             initial charge
2       20 December 2013       654       205       charged       205
3       23 December 2013      
4       28 December 2013       1118             charged
1       4 January 2014       1887       769       charged       769
2       11 January 2014       2205       318       charged       318
3       18 January 2014       2396       191       charged       191
4       26 January 2014       2857       461       charged       461
1       2 February 2014       3778       921       charged       921
2       15 February 2014       4062       289       charged       289       videos
3       22 February 2014       4067       5       OK       5
4       23 February 2014       4679       612       OK       612
3       1 March 2014       5025       346       OK       346
4       15 March 2014                               Was this a typo?
1       15 March 2014       6019       994       charged       994       Assuming the typo
2       5 April 2014       6219       200       charged       200
3       13 April 2014       6790       571       charged       571       Discharged to red indication
4       20 April 2014       7397       607       charged       607
1       3 May 2014       540       656       charged       666       Counter reset from 7503 to 0
2       18 May 2014       762       222       OK       222
3       18 May 2014       1132       370       charged       370
4       1 June 2014       1728       596       charged       596
1       9 June 2014       2286       558       charged       558
2       1 July 2014       2710       424       charged       424       flashing LED on first attempt
3       12 July 2014       3095       385       charged       385
4       23 July 2014       3575       480       charged       480
1       2 August 2104       4133       558             588
2       29 August 2014       4745       612       OK       612       removed before camera repair
1       27 September 2014       769       769       charged       769       started counting from 0 again
2       11 October 2014       1125       356
4       15 October 2014       1154       29       OK       29
3       15 October 2014       1457       303       OK       303       Many macros
4       19 October 2014       1571       114       charged       114
1       25 October 2014       2111       540       charged       540
2       4 November 2014       2440       329       charged             left powered on
3       "21014109" is not a valid date       2881       441       charged       441
4       15 November 2014       3276       395       charged       395
1       24 November 2014       4091       815       charged       815
2       13 December 2014       4567       376       charged       376
3       21 December 2014       5050       483       charged       483
4       4 January 2015       5434       384       charged       384
2       17 January 2015       5440       6       OK       6
1       17 January 2015       6233       793       charged       793
2       31 January 2015       6672       439       charged       439
3       14 February 2015       7032       360             360       no boost before use
4       20 February 2014       7515       483       charged       483
1       3 March 2015       8138       623       charged       623
2       15 March 2015       8480       342       charged       342
4       23 March 2015       8954       474       charged       474
1       4 April 2015       9822       868       charged       868
2       21 April 2015       0059       236       charged       236
3       29 April 2015
4             0872
1       24 May 2015       1234       362       charged       362
2       11 June 2015       1527       293       charged       293
3       27 June 2015       1545       18       charged       18       not recharged last time?
4       27 June 2015       1612       67             67       left powered on
3       27 June 2015       1863       251       OK
1       27 June 2015       1863       251       OK
1       31 July 2015       468       468       charged       468       after repair, counter reset
2       22 August 2015       700       232       charged       232
3       30 August 2015       965       265       charged       265
4       19 September 2015       1240       275       charged       275
1       29 September 2015       1675       435       charged       435
3       22 October 2015       1955       280       charged       280
2       5 November 2011       2293       298       charged       298       Problems refreshing (error indication, went away)
4       22 November 2015       2613       320       charged       320
1       29 November 2015       3179       566       charged       566
2       21 December 2015       3505       326       charged       326
3       6 January 2016       3826       320       charged       320
4       17 January 2016       4201       375       charged       375
1       6 February 2016       4808       607       charged       607
2       21 February 2016       5077       269       charged       269
3       27 February 2016       5672       595       charged       595
4       29 February 2016       5855       183       charged       183
1       1 March 2016       6450       595       charged       595
2       15 March 2016       6774       324       charged       324
3       26 March 2016       7184       410       charged       410
4       10 April 2016       7449       265       charged       265
1       16 April 2016       8096       647       OK       647       (Assumed transition)
2       14 May 2016       8934       838       OK, charged       838
3       22 May 2016       9318       384             384
4       30 May 2016       9403       85       OK, charged
4       30 May 2016       9911       508       OK, charged
1       11 June 2016       0072       161       charged
4       14 June 2016       0094       22       OK
2       14 June 2016       0094       0       DOA
3       17 June 2016       0462       368       charged       368       blinked, removed, OK
2       30 June 2016       0762       300       charged       300
4       16 July 2016       0783       21       Charged       21
1       16 July 2016       1477       694       Charged       694
3       6 August 2016       1721       244       Charged       244
4       17 August 2016       2213       392       Charged       392
1       2 September 2016       2836       623       Charged       623
2       19 September 2016       3319       493       Charged       493
3       26 September 2016       3628       309       Charged       309
4       10 October 2016       3837       209       Charged       209
1       20 October 2016       4520       683       Charged       683
2       12 November 2106       4722       202       Charged       202       left powered on
3       19 November 2016       5064       342       Charged       342
4       28 November 2016
1             5813
2       26 December 2016       5979       156       Charged       156
3       31 December 2016                   Sick             Boost charge failed, repeat succeeded
4       31 December 2016       6305       326       Charged       326
3       19 January 2017       6425       120       Charged       120       Left powered on
1       25 January 2017       6901       476       Charged       476
2       12 February 2017       7067       166       Charged       166       Left powered on, dead before recharge
3       23 February 2017       7199       132       Charged       132
4       23 March 2017       7414       215       Charged       215
1       12 May 2017       7788       364       Charged       364
2       31 July 2017       7796       8       OK       8
2       31 July 2017       7903       107       Charged       107
3       29 August 2017       8154       251       Charged       251
4       20 September 2017       8343       189       Charged       189
1       15 October 2017

E-PM2

I got the Olympus E-PM1 on 4 January 2017. It's only intended for occasional use, so in most case the battery charge reflects the lack of use.

I started this table some time after getting the camera. The batteries are compatible with Yvonne's E-PM2, so the numbers might not make sense.


Battery       Date       Last       Count       Status       Cumulative       Comments
      started       image                   count
4             3904             charged
2       27 August 2017
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