- Pump: MM 723 v2.4A
- Looping 24/7 (nominally), running every five minutes
Battery Type | n | Mean Duration [hr] | Standard Deviation [hr] |
---|---|---|---|
Energizer Ultimate Lithium | 2 | 232.0 | 7.4 |
Energizer Max | 2 | 151.0 | 4.2 |
Duracell Copper Top | 1 | 143.5 | — |
Panasonic Eneloop | 1 | 130.8 | — |
AmazonBasics | 6 | 128.5 | 22.9 |
Varta | 3 | 126.6 | 11.8 |
RadioShack | 2 | 104.9 | 2.7 |
Duracell Ultra PowerPix | 2 | 99.8 | 22.3 |
Total | 19 | 136.9 | 39.2 |
ID | Start Date & Time | Battery Type | Duration [hr] | Starting Voltage [V] | Ending Voltage [V] |
---|---|---|---|---|---|
01 | 2015-08-26 11:00 | AmazonBasics | 124.5 | ||
02 | 2015-08-31 15:30 | AmazonBasics | 101.5 | ||
03 | 2015-09-04 21:00 | Energizer Ultimate Lithium | 237.25 | ||
04 | 2015-09-14 18:15 | Energizer Ultimate Lithium | 226.75 | ||
05 | 2015-09-24 07:30 | AmazonBasics | 111.5 | 1.29 / 1.17 | |
06 | 2015-09-28 23:00 | RadioShack | 103.0 | 1.60 / 1.47 | 1.31 / 1.17 |
07 | 2015-10-03 08:30 | RadioShack | 106.75 | 1.59 / 1.46 | |
08 | 2015-10-07 19:15 | AmazonBasics | 158.0 | 1.28 / 1.16 | |
09 | 2015-10-14 09:30 | Varta | 132.75 | 1.57 / 1.44 | 1.30 / 1.16 |
10 | 2015-10-19 22:30 | Varta | 113.0 | 1.58 / 1.46 | / 1.16 |
11 | 2015-10-24 23:00 | AmazonBasics | 154.25 | / 1.51 | 1.29 / 1.14 |
12 | 2015-10-31 09:15 | Panasonic Eneloop | 130.75 | 1.44 / 1.41 | 1.18 / 1.17 |
13 | 2015-11-05 20:00 | Duracell Ultra PowerPix | 84.0 | 1.64 / 1.53 | 1.31 / 1.18 |
14 | 2015-11-09 08:00 | Energizer Max | 154.0 | 1.54 / 1.45 | 1.27 / 1.17 |
15 | 2015-11-15 18:45 | AmazonBasics | 121.25 | 1.59 / 1.52 | 1.30 / 1.17 |
16 | 2015-11-20 20:30 | Duracell Ultra PowerPix | 115.5 | 1.64 / 1.54 | / 1.17 |
17 | 2015-11-25 16:00 | Energizer Max | 148.0 | / 1.47 | 1.26 / 1.17 |
18 | 2015-12-02 20:00 | Varta | 134.0 | 1.57 / 1.46 | 1.29 / 1.15 |
19 | 2015-12-08 10:00 | Duracell Copper Top | 143.5 | 1.58 / 1.45 | 1.33 / 1.17 |
20 | 2015-12-14 09:30 | AmazonBasics | 1.62 / 1.51 |
- AmazonBasics AAA Performance Alkaline Batteries
- Energizer L92BP-Energizer Ultimate Lithium AAA Battery
- RadioShack AAA Alkaline Batteries
- Varta High Energy Alkaline AAA
- Panasonic Eneloop BK-4MCCA Rechargeable Ni_MH (note that battery tested is actually in a green outer sleeve and may be a slightly different product)
- Duracell Ultra PowerPix AAA Nickel Oxy Hydroxide Batteries (copyright on packaging is from 2009, so batteries may be old)
- Energizer Max AAA Batteries
- Duracell Copper Top AAA Alkaline Batteries
- Voltage measurements taken two ways at beginning and end of use:
- First listed value is open-circuit, as measured using a multimeter
- Second listed value is reported by the pump using
openaps use pump read_battery_status
, either right after battery insertion or on final loop before pump goes to "Low Battery" state - Battery 03: Stayed at full bars for first ~230 hours, then went to two bars and then zero bars within the final 10 hours
- Battery 04: Performed similarly, going from full bars when I went to sleep to a "Low Battery" state when I woke up (hence the discrepancy between the duration and the start time of the next battery)
- Battery 08: Higher duration likely due to extended periods where APS was not active
- Battery 09: At the end, caught the status reading "low"—meaning there was a successful transmission after it went to "Low Battery" state (happened about 7 minutes after the alert)
- Battery 11: Higher duration likely due to extended periods where APS was not active; starting and ending voltages as read by the pump were also the highest and lowest seen, respectively, thus far
- Battery 12: Charged to full capacity immediately before testing/insertion; voltage started low but hung around ~1.25 V (per
openaps use
) longer than others, anecdotally
- Medtronic's Changing Your Battery notes specify alkaline AAAs, and their [6 Battery Tips For Keeping Your Insulin Pump Powered Up] (http://www.loop-blog.com/6-battery-tips-for-keeping-your-insulin-pump-powered-up/) recommends Energizers
- A detailed analysis of different battery brands was performed by BitBox
did you know that rechargable 1,5v bateries exist?
http://www.ebay.com/sch/i.html?_odkw=kentli&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313.TR1.TRC0.A0.H0.Xkentli+aaa.TRS0&_nkw=kentli+aaa&_sacat=0