Joe, I did some measurements with a few of my meters.
edit 1: I added the BM857 and the 8060Aedit 2: I added the UT136C, MAS830L and 27/FM and reordered by Nominaledit 3: I added the PM300edit 4: I added the Mestek DM91A and the UT139CAll current and voltage measurements were done with my Keysight 36312A (cal due Aug/2019)
Model | Pack Description | mAh | NomCur | Backlight | MaxFunc | Cutoff | Nominal | Min |
Keysight U1273A | 4X AAA LR03 | 1000 | 30mA | N/A | 34mA | 4.2V | 33.33h | 29.41h |
Brymen BM857 | 1X 9V 6LR61 | 550 | 5.2mA | 42mA | 5.6mA | 5.8V | 105.8h | 98.20h |
Fluke 8060A | 1X 9V 6LR61 | 550 | 4.0mA | N/A | 4.6mA | 3.9V | 137.5h | 119.6h |
Sanwa PM300 | 1X 3V CR2032 | 235 | 1.4mA | N/A | 2.0mA | 1.7V | 167.8h | 117.5h |
Uni-T UT61E | 1X 9V 6LR61 | 550 | 3.2mA | N/A | 5.4mA | 1.6V | 171.9h | 101.9h |
Surpeer AV4 | 1X 9V 6LR61 | 550 | 2.8mA | 31mA | 5.2mA | 3.1V | 196.4h | 105.8h |
Uni-T UT136C | 1X 9V 6LR61 | 550 | 1.8mA | N/A | 2.9mA | 2.3V | 305.6h | 189.7h |
Keysight U1282A | 4X AA LR06 | 2000 | 5.3mA | 38mA | 7.1mA | 3.9V | 377.4h | 281.7h |
Mestek DM91A | 2X AAA LR03 | 100 | 1.7mA | 3.7mA | 3.2mA | 2.2V | 588.2h | 270.2h |
Fluke 27/FM | 1X 9V 6LR61 | 550 | 0.7mA | N/A | 1.7mA | 3.6V | 785.7h | 323.5h |
Uni-T UT139C | 2X AA LR06 | 2000 | 1.7mA | 10.5mA | 2.4mA | 2.1V | 1176h | 833.3h |
Mastech MAS830L | 1X 9V 6LR61 | 550 | 0.3mA | 30mA | 1.9mA | 4.4V | 1833h | 289.5h |
Considerations:
- V
AC used on NomCur. No other modes or settings.
- UT61E is unmodified (non-GS version).
- Cutoff voltage measured until meter is powered off. Low Batt indicator was not considered.
- AV4, 8060A, BM857 and MSP830L started drifting. This was the Cutoff voltage used.
- UT61E, UT136C, 8060A, 27/FM and PM300 do not have backlight. U1273A has OLED display.
- Battery life was obtained with
mAh/
current. Far from ideal, given the cutoff voltage will reduce that, but enough for comparison.