Greg's battery life records

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:

OK: still has charge, removed for some other reason.
Charged: Battery was discharged, was successfully charged again.
Fading: Battery required multiple attempts to charge.
Sick: Battery took some charge, didn't complete charge. Battery still usable.
Dead: Charge failed, battery showed no voltage.
Resurrected: Charge failed, battery showed no voltage after charge, but later showed voltage again.

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	9748	1057	Charged
2	6 November 2017	10581	833	Charged	33% → red flash
1	22 November 2017	14169	3588	Charged	Focus stack experiments
2	10 December 2017	15046	877	Charged	25%
1	30 December 2017	15800	754	Charged	21%
2	26 January 2018	16432	632	Charged
1	23 February 2018	17184	752	Charged	18%
2	1 April 2018	17712	528	Charged	13%
1	2 May 2018	18482	770	Charged	12%
2	3 June 2018	19222	740	Charged	12%, not completely discharged
1	7 July 2018	19909	687	Charged	11%
2	28 July 2018	20699	790	Charged	18%
1	25 August 2018	21256	557	Charged	27%, not completely discharged
2	17 September 2018	21623	367	Charged	25%, not completely discharged
1	6 October 2018	22422	799	Charged	10%?	Red light flashing
2	23 October 2018	23199	777	Charged	15% odd
1	7 November 2018	24114	915	Charged	14%
2	24 November 2018	23892	778	Charged	12%
1	21 December 2018	25426	1534	Charged	flashing, much video.
2	19 January 2019	25982	556	Charged
1	16 February 2019	27524	1542	Charged
2	22 March 2019	28123	599	Charged
1	17 April 2019	28861	758	Charged
2	25 May 2019	29522	661	Charged
1	23 June 2019	30199	677
2	13 July 2019	?		Charged
1	?	31151		Charged
2	29 August 2019	31862	709	Charged
1	28 September 2019	32587	725	Charged
2	18 October 2019	33712	1125	Charged
1	11 November 2019	33953	241	OK	75%
2	22 November 2019			OK	55% preparation for video
1	23 November 2019	34182	229	OK
2	28 November 2019	34966	784	Charged	10%
1	22 December 2019	35641	675	Charged
2	6 January 2020	36201	560	Charged	12%
1	29 January 2020	36525	325	Charged	11%
2	11 February 2020	37888	1363	Charged	10%
1	8 March 2020	38490	602	Charged	10%
2	6 April 2020	39113	623	Charged	10%
1	7 May 2020	39739	626	Charged	10%
2	23 May 2020	40305	566	Charged	10%
1	20 June 2020	40813	508	Charged	10%
2	17 July 2020	41539	726	Charged	10%
1	1 August 2020	41916	377	Charged	10%	Left powered on?
2	26 August 2020	42409	493	Charged	10%
1	19 September 2020	42993	584	Charged	10%
2	7 October 2020	44241	1248	Charged	10%
1	28 October 2020	44870	629	Charged	10%
2	17 November 2020	45548	678	Charged	10%
1	8 December 2020	46116	568	Charged	10%
2	28 December 2020
1		47407		Charged
?		47949	542
1	22 February 2021	48335	384	Charged	10%	30 minutes video
2	29 March 2021	49034	699	Charged	10%
1	24 April 2121	49632	598	Charged	10%
2	21 May 2021	50296	664	Charged	10%
1	20 June 2021	50875	579	Charged	10%
2	23 July 2021	51685	810	Charged	10%
1	21 August 2021	52294	609	Charged	10%
2	11 September 2021	52963	669	Charged	10%
1	11 October 2021	53722	759	Charged	10%
2	17 November 2021	53734	14	Charged	10%	started at 95%, repeated
1	18 November 2021	54433	599	Charged	11%
2	29 December 2021	55211	778	Charged	10%
1	29 January 2022	55874	763	Charged	10%
2	12 March 2022	56615	741	Charged	11%
1	16 April 2022
2		57986	(1371)	Charged	10%
1	24 June 2022	58652	666	Charged	10%
2	21 July 2022	59087	435	Charged	10%	left powered on
1	6 August 2022	59992	905	Charged	10% + 36
2	17 September 2022	60789	797	Charged	10%
1	25 October 2022	61598	809	Charged	10%
2	26 November 2022	62484	886	Charged	<10% (red flashing)
1	31 December 2022	63083	599	Charged	<10% (red flashing)
2	2 February 2023	63985	902	Charged	<10% (at least 36 over)
1	4 March 2023	64716	731	Charged
2	14 April 2023	65745	1029	Charged
1	1 June 2023	66621	876	Charged
2	5 August 2023	67667	1046	Charged	< 10% (52 over), needed recharge before use
1	17 September 2023	68764	1097	Charged	Left powered on
2	14 October 2023	69615	851	Charged	Left powered on
1	25 November 2023	69617	2	Charged	Left powered on
2	5 January 2024	70409	582	Charged	Something wrong here
1	17 February 2024	71784	1375	Charged
2	27 February 2024	71980	196	Charged	Left powered on
?
2	?	73059		Charged
1	13 April 2024	73873	714	Charged
2	22 May 2024	74890	1017	Charged	< 10% (117 over)
1	6 July 2024	75735	845	Charged
2	8 August 2024	76634	899	Charged
1	2 October 2024	77647	1013		< 10% (At least 48 over)

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.

Battery 1 was an original Olympus BLN-1 with a capacity of 1220 mAh. The others are aftermarket batteries with a claimed capacity of 1999 (!) mAh. The charge history suggest that they might have about half that capacity. But they were far cheaper, so I'm not complaining.

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

In May 2024, the camera failed with a mechanical failure (IBIS?) that wasn't worth repairing. On 27 May 2024 I replaced it with another camera of the same model. I continue to use the same batteries, including a new one that came with the camera.

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			Fading		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	8672	329	Charged	329
2	28 November 2017	10439	767	Charged	767
3	26 December 2017	10652	223	Charged	223
4	16 February 2018	114		Charged		Counter reset by firmware upgrade
2	15 March 2018	348	234	Fading	234	Required two attempts
3	6 April 2018	1158	810	Fading	810	Three attempts
4	28 April 2018	1371	214
2	1 May 2018			Fading		Refresh took 2 attempts
1	17 May 2018	1623	252	Charged	252
2	1 September 2018
1	17 September 2018	1764	Charged
2	8 November 2018	1854	90	Charged	90
3	21 December 2018	2045	191	Charged	191
4	5 March 2019	2165	120	Fading	120	Required two attempts
1	29 June 2019	2264	99	Charged	99	Required two attempts
2	21 September 2019	2441	177	Charged	177
3	15 October 2019	2584	143	OK	143	Preparations for long shooting day
2	22 November 2019	2803	219	Charged	219
3	8 December 2019	2965	162	Charged	162	Camera left powered on
4	26 January 2020	3133	168	Charged	168
1	25 March 2020
2	?	3377		Charged
3	26 September 2020	3559	182
4	?	3676		Charged
1	23 April 2021	3715	39	Charged
1	24 April 2021	4003	288	Charged
2	9 July 2021	4154	151	Charged
3	24 August 2021	4356	310	Charged
4	24 August 2021			fail
2	24 August 2021			fail
4	24 August 2021			Charged
2	24 August 2021			Charged
1	15 October 2021	4670	314	Charged
2	27 November 2021
4
1	2 March 2022	5609		Charged
2	3 April 2022			dead, discarded
3	3 April 2022	5888	279
4	15 May 2022	6175	287	dead, discarded
1	14 July 2022	6307	132	OK
5	26 July 2022	6476	169	OK	Left powered on?	Observe
5	22 August 2022	6485	9	dead	returned
1	22 August 2022	6557	72	OK	replaced with 6
6	26 August 2022	6923	366	Charged
6	4 September 2022	7070	147	Charged
6	25 September 2022	7272	202	Charged
6	21 October 2022	7423	151	Charged
3	21 November 2022	7471	48	OK, charged
6	21 November 2022	7627	156	Charged
6	20 December 2022	7821	194	Charged
1	16 January 2023	7841	20	Charged	Left powered on
3	21 January 2023	7945	104	Charged	Left powered on
4	17 February 2023	8167	222	Works after all
6	25 March 2023	8293	126	charged	left powered on
1	18 April 2023	8441	148	charged	completely discharged before charging
3	22 May 2023	8638	197
4	20 August 2023	8774	136	charged	left powered on
3	12 September 2023	9023	249	sick	charged after 4th attempt
6	7 November 2023	9111	88	charged
1	Date may not include time
4	26 November 2023	9145		charged
6	10 February 2024	9623		charged
1	7 April 2024	9745	122	charged	left powered on
3	7 April 2024	9962	217	charged
3	13 August 2024	10194	232	charged	overrun warning by 47 shots
4	22 September 2024	10412	218	charged
6	3 November 2024

E-PM1

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

3904

charged

27 August 2017