# Thread: AccuEvolution D 10Ah capacity check

1. ## AccuEvolution D 10Ah capacity check

This is the start of a 6 month test for AccuEvolution D 10Ah.

This exercise is to find out capacity out of retail package, after each forming charge and what remains after 6 months. This will also show benefit (or not) when forming charge is performed back to back. This activity will also compare the discharge numbers reported by BC8DP (#2, #3, #4) with CBA3 (#1, #5).

Advertised capacity is 10Ah. Noted that charging instruction is printed on battery label (900ma/12hr;2A/5hr) is different from manufacturer's website (950mA/12h;2A/342min). Also, there are no production dates or lot numbers printed so I don't know how long these batteries have been out on retail shelves.
These batteries were purchased May, 2011 and kept in their retail package until start of test.

Procedure as follows:
1. First discharge on a CBA3.
2. Three forming charge/discharge cycles using BC8DP with 1 hour pause in between.
3. Battery charged, about 1 hour pause, then discharged on CBA3.
4. Battery charged, will be discharged on CBA3 six months from now.

Other notes:
a. All charge is at 1.0 A (.1C) up to 16,000 mAh.
b. All discharge is at 2.0 A (.2C) down to 0.9 volts.
c. Discharge 1 is capacity available out of retail package.
d. Discharge 2, 3 and 4 is capacity reported by hobby charger BC8DP.
e. Discharge 5 is capacity after a total of 4 forming charges.
f. Discharge 6, after six months is to test LSD.
g. CBA3 logs total mAh so value is pro-rated for time/capacity numbers (#1 #5).

Summary of time and capacity in mAh (% of 10000) to reach certain voltage below.

Battery A
# + 1.20V --------------- + 1.10V --------------- + 1.00V --------------- + End -------------------
1 | 0:01:20 0044 ( 0.44%) | 0:32:00 1066 (10.66%) | 0:40:25 1347 (13.47%) | 0:42:46 01425 ( 14.25%)
2 | 0:17:45 0587 ( 5.87%) | 3:35:13 7167 (71.67%) | 4:42:20 9404 (94.04%) | 5:01:36 10043 (100.43%)
3 | 0:17:17 0572 ( 5.72%) | 3:30:55 7025 (70.25%) | 4:36:48 9220 (92.20%) | 4:56:28 09874 ( 98.74%)
4 | 0:16:46 0556 ( 5.56%) | 3:28:32 6947 (69.47%) | 4:33:32 9112 (91.12%) | 4:53:23 09773 ( 97.73%)
5 | 3:47:55 7597 (75.97%) | 4:37:27 9248 (92.48%) | 4:49:43 9656 (96.56%) | 4:55:17 09842 ( 98.42%)

Battery B
# + 1.20V --------------- + 1.10V --------------- + 1.00V --------------- + End -------------------
1 | 0:00:00 0000 ( 0.00%) | 0:00:00 0000 ( 0.00%) | 0:00:06 0003 ( 0.03%) | 0:00:41 00022 ( 00.22%)
2 | 0:18:04 0598 ( 5.98%) | 3:33:26 7108 (71.08%) | 4:42:28 9408 (94.08%) | 4:57:52 09918 ( 99.18%)
3 | 0:17:14 0571 ( 5.71%) | 3:25:40 6849 (68.49%) | 4:35:23 9172 (91.72%) | 4:52:07 09727 ( 97.27%)
4 | 0:17:21 0574 ( 5.74%) | 3:23:40 6782 (67.82%) | 4:31:55 9056 (90.56%) | 4:49:18 09634 ( 96.34%)
5 | 4:03:58 8132 (81.32%) | 4:48:52 9628 (96.28%) | 4:57:17 9909 (99.09%) | 5:00:44 10024 (100.24%)

Battery C
# + 1.20V --------------- + 1.10V --------------- + 1.00V --------------- + End -------------------
1 | 0:10:25 0347 ( 3.47%) | 0:44:32 1484 (14.84%) | 0:49:40 1655 (16.55%) | 0:51:44 01724 ( 17.24%)
2 | 0:13:43 0453 ( 4.53%) | 3:14:02 6461 (64.61%) | 4:45:40 9514 (95.14%) | 5:06:16 10200 (102.00%)
3 | 0:10:43 0354 ( 3.54%) | 2:58:53 5957 (59.57%) | 4:40:49 9353 (93.53%) | 5:03:35 10110 (101.10%)
4 | 0:10:03 0330 ( 3.30%) | 2:53:03 5762 (57.62%) | 4:38:26 9273 (92.73%) | 5:01:32 10042 (100.42%)
5 | 3:53:32 7784 (77.84%) | 4:47:25 9580 (95.80%) | 4:57:59 9932 (99.32%) | 5:02:06 10069 (100.69%)

Battery D
# + 1.20V --------------- + 1.10V --------------- + 1.00V --------------- + End -------------------
1 | 0:15:35 0519 ( 5.19%) | 0:51:07 1704 (17.04%) | 0:56:33 1885 (18.85%) | 0:59:12 1973 ( 19.73%)
2 | 0:14:23 0475 ( 4.75%) | 3:14:37 6480 (64.80%) | 4:26:11 8864 (88.64%) | 4:44:45 9483 ( 94.83%)
3 | 0:14:39 0485 ( 4.85%) | 3:14:46 6486 (64.86%) | 4:22:59 8759 (87.59%) | 4:42:11 9397 ( 93.97%)
4 | 0:14:39 0484 ( 4.84%) | 3:15:01 6494 (64.94%) | 4:22:15 8734 (87.34%) | 4:41:41 9380 ( 93.80%)
5 | 3:53:02 7767 (77.67%) | 4:40:15 9341 (93.41%) | 4:51:01 9700 (97.00%) | 4:55:26 9847 ( 98.47%)

Summary of discharge curve #1 [CBA3], average (#2 #3 #4) [BC8DP] and #5 [CBA3] for each battery.

CBA3 discharge graph (#1 #5).

Battery A details

Battery B details

Battery C details

Battery D details

2. ## Re: AccuEvolution D 10Ah capacity check

When were these purchased?
That one thread called AccuEvolution D cell quality gone! has worried me, since I've wanted to get some C and D cell NiMH.

3. ## Re: AccuEvolution D 10Ah capacity check

Another excellent thread thanks. I'm glad to see some testing being done on D cells...

4. ## Re: AccuEvolution D 10Ah capacity check

I just received 4 of these and am interested in the test results. Thank you for taking the time to run these tests.
Dave

5. ## Re: AccuEvolution D 10Ah capacity check

Subscribed! I have several of these now. I've been following the other thread, but it doesn't really have hard numbers like this one. Thanks my2cents.

6. ## Re: AccuEvolution D 10Ah capacity check

Capacity remaining after 6 months below.
Included min/max thermometer shows range of 15-26 degrees celsius while in storage.
Note % remaining is based on 10,000 mAh (advertised capacity) and not actual (per forming charge) at the start of this post.

# + 1.20V --------------- + 1.10V --------------- + 1.00V --------------- + End -----------------
1 | 1:44:38 3487 (34.87%) | 2:58:13 5940 (59.40%) | 3:13:01 6433 (64.33%) | 3:18:03 6601 (66.01%)
2 | 0:35:29 1182 (11.82%) | 2:06:05 4202 (42.02%) | 2:19:00 4632 (46.32%) | 2:22:18 4742 (47.42%)
3 | 1:58:50 3960 (39.60%) | 3:33:35 7118 (71.18%) | 3:46:58 7564 (75.64%) | 3:50:57 7697 (76.97%)
4 | 2:17:42 4589 (45.89%) | 3:40:00 7332 (73.32%) | 3:54:39 7820 (78.20%) | 3:59:25 7979 (79.79%)

CBA3 discharge graph before (#5) and after (#6) storage below.

7. ## Re: AccuEvolution D 10Ah capacity check

Poor consistency and doesn't appear to have very good LSD qualities.

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